fem. proper name, from Welsh Gwenhwyvar, from gwen "fair, white" + (g)wyf "smooth, yielding." The most popular name for girls born in America 1970-1984; all but unknown there before 1938. Also attested as a surname from late 13c.
jellyroll
Jemima
Jemmy
Jena
jennet
Jennifer
Jenny
jeopardise
jeopardize
jeopardy
Jephthah