Online Etymology Dictionary

loco (adj.): 1844, American English, from Spanish loco (adj.) "insane," of uncertain origin, perhaps from Arabic lauqa, fem. of 'alwaq "fool, crazy person." Loco-weed (1877) was name given to species of western U.S. plants that cause cattle and horse diseases that make them stagger and act strangely.
Lombard (n.): from Late Latin Langobardus, proper name of a Germanic people who originated in Scandinavia, migrated to the Elbe area 1 c. C.E., then to Pannonia (5 c.) and in 6 c. conquered northern Italy and settling in the northern region that became known as Lombardy, ruling for two centuries. Their name is from Proto-Germanic Langgobardoz, often said to mean literally "Long-beards," but perhaps rather from *lang- "tall, long" + the proper name of the people (Latin Bardi). Their name in Old English was Langbeardas (plural), but also Heaðobeardan, from heaðo "war."

In Middle English the word meant "banker, money-changer, pawnbroker" (late 14c.), from Old French Lombart "Lombard," also "money-changer; usurer; coward," from Italian Lombardo (from Medieval Latin Lombardus). Lombards in Middle Ages were notable throughout Western Europe as bankers and money-lenders, also pawn-brokers; they established themselves in France from 13c., especially in Montpellier and Cahors, and London's Lombard Street (c. 1200) originally was the site of the houses of Lombard bankers. French also gave the word in this sense to Middle Dutch and Low German. Lombardy poplar, originally from Italy but planted in North American colonies as an ornamental tree, is attested from 1766.
Tib: 1530s, typical name for an English woman of the lower class, hence "girl, lass, sweetheart," sometimes also "strumpet," from the pet form of Isabel. Often paired with Tom, as Jill was with Jack. Colloquial St. Tibb's Eve (1785) was the evening of the last day, the Day of Judgement, hence "never."
tipstaff (n.): 1540s, "tipped staff" (truncheon with a tip or cap of metal) carried as an emblem of office, from tip (n.) + staff (n.). As the name of an official who carries one (especially a sheriff's officer, bailiff, constable, court crier, etc.) it is recorded from 1560s.
Anastasia: fem. proper name, from fem. of Late Latin Anastasius, from Greek Anastasios, from anastasis "resurrection," literally "a standing or rising up," from ana "up; again" (see ana-) + histanai "to cause to stand, to stand up" from PIE root *stā- "to stand" (see stet).
Anatolia: ancient name of Asia Minor, from Medieval Latin Anatolia, from Greek anatole "the east," originally "sunrise" (which of course happens in the east), literally "a rising above (the horizon)," from anatellein "to rise," from ana "up" (see ana-) + tellein "to accomplish, perform."
Andromeda: constellation, 1667 (earlier Andromece, mid-15c.); in classical mythology the daughter of Cepheus and Cassiopeia, from Greek, literally "mindful of her husband," from andros, genitive of aner "man" (see anthropo-) + medesthai "to be mindful of, think on," related to medea (neuter plural) "counsels, plans, devices, cunning" (and source of the name Medea).
Ann: fem. proper name, alternative form of Anna, from Latin Anna, from Greek, from Hebrew Hannah (see Hannah). In African-American vernacular, "white woman," also "a black woman who is considered to be acting 'too white;' " also Miss Ann. She is the spouse of Mr. Charlie.
annelid (n.): "segmented worm," 1834, from French annélide, source of the phylum name Annelida, coined in Modern Latin 1801 by French naturalist J.B.P. Lamarck (1744-1829), from annelés "ringed ones" (from Latin anulus "little ring," a diminutive of anus; see anus) + Greek eidos "form, shape" (see -oid).
boa (n.): late 14c., "large snake," from Latin boa, type of large serpent mentioned in Pliny's "Natural History;" origin unknown (in Middle English folk etymology associated with Greek bous "ox"). Extension to "snake-like coil of fur worn by ladies" is from 1836. The popular name boa constrictor is from 1788.
Antigone: daughter of Oedipus, her name may mean "in place of a mother" in Greek, from anti- "opposite, in place of" (see anti-) + gone "womb, childbirth, generation," from root of gignesthai "to be born" related to genos "race, birth, descent" (see genus).
anti-macassar (n.): also antimacassar, 1852, from anti- + macassar oil, proprietary name of a hair tonic advertised as imported from the district of Macassar on the Indonesian island of Sulawesi. The cloth was laid to protect chair and sofa fabric from people leaning their oily heads back against it.
antinomian (n.): "one who maintains the moral law is not binding on Christians under the law of grace," 1640s, from Medieval Latin Antinomi, name given to a sect of this sort that arose in Germany in 1535, from Greek anti- "opposite, against" (see anti-) + nomos "rule, law" (see numismatic).
megalopolis (n.): 1832, from comb. form of Greek megas (genitive megalou) "great" (see mickle) + polis "city" (see polis). The word was used in classical times as an epithet of great cities (Athens, Syracuse, Alexandria), and it also was the name of a former city in Arcadia.
megillah (n.): "long, tedious, complicated story," 1957, from Yiddish (as in a gantse Megillah "a whole megillah"), literally "roll, scroll," collective name of the five Old Testament books appointed to be read on certain feast days, from Hebrew meghillah, from galal "he rolled, unfolded." The slang use is in reference to the length of the text.
Melba: in various food preparations, especially peach Melba (1905) and Melba toast (1925) is in honor of Nellie Melba, stage name (based on Melbourne, Australia) of Australian-born operatic soprano Helen Mitchell (1861-1931).
penicillin (n.): 1929, coined in English by Alexander Fleming (1881-1955), who first recognized its antibiotic properties, from Modern Latin Penicillium notatum (1867), the name of the mould from which it was first obtained, from Latin penicillus "paintbrush" (see pencil (n.)), in reference to the shape of the mould cells.
Peter Pan (n.): name of boy-hero in J.M. Barrie's play "Peter Pan, or The Boy Who Wouldn't Grow Up" (1904). Used allusively for an immature adult man from 1914 (by G.B. Shaw, in reference to the Kaiser).
Peter Principle: 1968, "in a hierarchy, every employee tends to rise to his level of incompetence," named for (and by) Laurence Johnston Peter (1919-1990) Canadian-born U.S. educationalist and author, who described it in his book of the same name (1969).
funambulist (n.): "tightrope-walker," 1793, coined from Latin funis "a rope, line, cord," + ambulare "to walk" (see amble (v.)). Earlier was funambulant (1660s), funambule (1690s from Latin funambulus, the classical name for a performer of this ancient type of public entertainment), and pseudo-Italian funambulo (c. 1600). Related: Funambulate; funambulation; funambulatory.
Clematis (n.): plant genus, 1550s, "periwinkle," from Latin Clematis, from Greek klematis, in Dioscorides as the name of a climbing or trailing plant (OED says probably the periwinkle) with long and lithe branches, diminutive of klema "vine-branch, shoot or twig broken off" (for grafting), from klan "to break" (see clastic).
Cleveland: city in Ohio, U.S., laid out 1796 by Gen. Moses Cleaveland (1754-1806) and later named for him. His descendants included U.S. President Grover Cleveland (1837-1908). The family name is from place names in England based on Middle English cleove, a variant of cliff.
clink (n.2): "prison," 1770s, apparently originally (early 16c.) the Clynke on Clink Street in Southwark, on the estate of the bishops of Winchester. To kiss the clink "to be imprisoned" is from 1580s, and the word and the prison name might be cognate derivatives of the sound made by chains or metal locks (see clink (v.)).
Clovis: type of prehistoric stone spearpoints, 1943, from Clovis, New Mexico, U.S., near which place they were found. The town is said to have been named for the Frankish king Clovis (Latinized from Frankish Chlodovech, from Germanic masc. proper name *hluda-wigaz "famous in battle," cognate with Ludwig and Louis).
bodice (n.): 1560s, oddly spelled plural of body, name of a tight-fitting Elizabethan garment covering the torso; plural because the body came in two parts which fastened in the middle. Bodice-ripper for "racy romance novel" is from 1981.
Clara: fem. personal name, from Latin Clara, from fem. of clarus "bright, shining, clear" (see clear (adj.) and compare Claire). Derivatives include Clarisse, Clarice, Clarabel, Claribel. The native form Clare was common in medieval England, perhaps owing to the popularity of St. Clare of Assisi.
Gwendolyn: fem. proper name; the first element is Breton gwenn "white" (source also of Welsh gwyn, Old Irish find, Gaelic fionn, Gaulish vindo- "white, shining," literally "visible"), from nasalized form of PIE root *weid- "to see, know" (see vision).
Dorian (adj.): c. 1600, in reference to the mode of ancient Greek music, literally "of Doris," from Greek Doris, district in central Greece, traditionally named for Doros, legendary ancestor of the Dorians, whose name is probably related to doron "gift" (see date (n.1)).
Dorothy: fem. proper name, from French Dorothée, from Latin Dorothea, from Greek, literally "gift of God," from doron "gift" (see date (n.1)) + fem. of theos "god" (see theo-). With the elements reversed, it becomes Theodora. The accessory called a Dorothy bag is so called from 1907.
doughboy (n.): "U.S. soldier," 1864, American English, said to have been in oral use from 1854, or from the Mexican-American War (1847), it is perhaps from resemblance of big buttons on old uniforms to a sort of biscuit of that name (1680s), but there are various other conjectures.
groschen (n.): 1610s, small silver coin formerly used in Germany and Austria, from German groschen, altered from Czech groš, name of a coin (about one-thirtieth of a thaler), from Medieval Latin (denarius) grossus, literally "a thick coin," from Latin grossus "thick" (see gross (adj.), and compare groat).
Grub-street (n.): 1620s, "originally the name of a street in Moorfields in London, much inhabited by writers of small histories, dictionaries, and temporary poems; whence any mean production is called grubstreet" [Johnson]. The place was renamed 1830 to Milton Street (after a local developer) then erased entirely 1970s by the Barbicon complex.
grundyism (n.): "social censorship of personal conduct in the name of conventional propriety," 1836, from Mrs. Grundy, prudish character in Thomas Morton's 1798 play "Speed the Plow," play and playwright otherwise now forgotten, but the line "What would Mrs. Grundy say?" became proverbial.
Gullah: "of or pertaining to blacks on the sea-islands of Georgia and South Carolina," 1739 (first attested as a male slave's proper name), of uncertain origin. Early 19c. folk etymology made it a shortening of Angola (homeland of many slaves) or traced it to a West African tribal group called the Golas.
Exocet (n.): 1970, proprietary name of a rocket-propelled short-range guided missile, trademarked 1970 by Société Nationale Industrielle Aerospatiale, from French exocet "flying fish" (16c.), from Latin exocoetus, from Greek exokoitos "sleeping fish, fish that sleeps upon the beach," from exo "outside" (see exo-) + koitos "bed."
requiescat (n.): name of a prayer for the repose of the dead, from Latin phrase requiescat in pace (often abbreviated R.I.P.), literally "may he (or she) begin to rest in peace," from third person singular inceptive of requies "rest, repose" (see requiem).
free-wheeling (adj.): also freewheeling, 1903, from free wheel (1899, see free (adj.) + wheel (n.)); a bicycle wheel that turns even when not being pedaled, later from the name of a kind of automobile drive system that allowed cars to coast without being slowed by the engine. Figurative sense is from 1911.
Lupercalia (n.): Roman festival held Feb. 15, in honor of Lupercus, god (identified with Lycean Pan) who had a grotto at the foot of the Palatine Hill, from Latin Lupercalia (plural), from Lupercalis "pertaining to Lupercus," whose name derives from lupus "wolf" (see wolf (n.)).
Merovingian (adj.): 1690s, from French Mérovingien, from Medieval Latin Merovingi, "descendants of Meroveus," (mythical?) ancestor of the line of Frankish kings in Gaul (c.500-752) beginning with Clovis; Merovingi is a Latinization of his Germanic name (compare Old High German Mar-wig "famed-fight") with the Germanic patronymic suffix -ing.
Tommy: "British soldier," 1884, from Thomas Atkins, since 1815 the typical sample name for filling in army forms. Tommy gun (1929) is short for Thompson gun (see Thompson). Soon extended to other types of sub-machine gun, especially those favored by the mob.
philander (v.): 1737, from the noun meaning "a lover" (1700), from Philander, popular name for a lover in stories, drama, and poetry, from Greek adjective philandros "with love for people," perhaps mistaken as meaning "a loving man," from phil- "loving" (see philo-) + andr-, stem of aner "man" (see anthropo-). Related: Philandered; philandering.
Philip: masc. proper name, from Latin Philippus, from Greek Philippos "fond of horses," from philos "beloved, loving" (see philo-) + hippos "horse" (see equine). In 16c., Philip and Cheyney was a way to say "any two common men."
Philistine: Old Testament people of coastal Palestine who made war on the Israelites, early 14c., from Old French Philistin, from Late Latin Philistinus, from Late Greek Philistinoi (plural), from Hebrew P'lishtim, "people of P'lesheth" ("Philistia"); compare Akkad. Palastu, Egyptian Palusata; the word probably is the people's name for itself.
phlox (n.): 1706, from Latin, where it was the name of a flower (Pliny), from Greek phlox "kind of plant with showy flowers" (probably Silene vulgaris), literally "flame," related to phlegein "to burn" (see bleach (v.)). Applied to the North American flowering plant by German botanist Johann Jakob Dillenius (1684-1747).
Roderick: also Roderic, masc. proper name, from Old High German Hroderich, literally "ruling in fame," from hruod- "fame, glory" + Proto-Germanic *rikja "rule" (see rich). Italian and Spanish Rodrigo, Russian Rurik are from German.
roly-poly (adj.): "short and stout," 1820, probably a varied reduplication of roll (v.). As a noun, it was used as the name of various ball games from 1713, and it was used as early as 1610s in the sense of "rascal." As an appellation of a short, stout person, from 1836.
physics (n.): 1580s, "natural science," from physic in sense of "natural science." Also see -ics. Based on Latin physica (neuter plural), from Greek ta physika, literally "the natural things," name of Aristotle's treatise on nature. Specific sense of "science treating of properties of matter and energy" is from 1715.
pi (n.): Greek letter, from Hebrew, literally "little mouth." As the name of the mathematical constant, from 1841 in English, used in Latin 1748 by Swiss mathematician Leonhart Euler (1707-1783), as an abbreviation of Greek periphereia "periphery." For the meaning "printer's term for mixed type," see pie (3).
pianola (n.): c. 1896, trademark name (1901) of a player piano, from piano, the ending perhaps abstracted from viola and meant as a diminutive suffix. The pianola's popularity led to a rash of product names ending in -ola, especially Victrola (q.v.), and slang words such as payola.
picayune (n.): 1804, "coin of small value," probably from Louisiana French picaillon "coin worth 5 cents," earlier the French name of an old copper coin of Savoy (1750), from Provençal picaioun "small copper coin," from picaio "money," of uncertain origin. Adjectival figurative sense of "paltry, mean" recorded from 1813.