"young deer," mid-14c., from Anglo-French (late 13c.), Old French faon, feon "young animal" (12c.), from Vulgar Latin *fetonem (nominative *feto), from Latin fetus "an offspring" (see fetus). Still used of the young of any animal in King James I's private translation of the Psalms, but mainly of deer from 15c. Color use is 1881.