Jake
来自Big Physics
wiktionary
Originally a medieval variant of Jack, derived from John; today also used as a diminutive form of Jacob and James.
etymonline
Jake
colloquial or familiar abbreviation of the masc. proper name Jacob (q.v.). As the typical name of a rustic lout, from 1854. (Jakey still is the typical name for "an Amishman" among the non-Amish of Pennsylvania Dutch country). Slang meaning "excellent, fine" is from 1914, American English, of unknown origin.
