what the subject says...
O.E. cu, from P.Gmc. *kwon, earlier *kwom, from PIE *gwous (cf. Skt. gaus, Gk. bous, L. bov-), perhaps ult. imitative of lowing (cf. Sumerian gu, Chinese ngu, ngo "ox"). In Gmc., of females only; in other languages, of either gender. Cowhand is first attested 1852 in Amer.Eng.; cowboy is from 1725, originally "a boy who tends cows;" Western U.S. sense from 1849, as an adj. meaning "reckless," 1920s; cowlick is from 1598. Cowpoke (1881) was originally restricted to the cowboys who prodded cattle onto railroad cars with long poles.
The same reason everything else has its name.. human, pig, ducks, raccoons lol Its prolly impossable to know!
latin for milk-giver. crap idk!! lol. good question