nobody (n.)

c. 1300, no bodi "no person no one," from Middle English no (adj.) "not any" + bodi (see body (n.)). Written as two words 14c.-18c.; hyphenated 17c.-18c. Incorrect use with their is attested from 1540s. Meaning "person of no importance, one who is not fashionable in society" is from 1580s.