henchmanyoudaoicibaDictYouDict[henchman 词源字典]
henchman: [14] Early spellings such as hengestman and henxstman suggest that this word is a compound of Old English hengest ‘stallion’ and man ‘man’. There are chronological difficulties, for hengest seems to have gone out of general use in the 13th century, and henchman is not recorded until the mid-14th century, but it seems highly likely nevertheless that the compound must originally have meant ‘horse servant, groom’.

The word hengest would no doubt have remained alive in popular consciousness as the name of the Jutish chieftain Hengist who conquered Kent in the 5th century with his brother Horsa; it is related to modern German hengst ‘stallion’, and goes back ultimately to a prehistoric Indo-European kənku-, which denoted ‘jump’. Henchman remained in use for ‘squire’ or ‘page’ until the 17th century, but then seems to have drifted out of use, and it was Sir Walter Scott who revived it in the early 19th century, in the sense ‘trusty right-hand man’.

[henchman etymology, henchman origin, 英语词源]
henchman (n.)youdaoicibaDictYouDict
mid-14c., hengestman, later henshman (mid-15c.) "high-ranking servant (usually of gentle birth), attendant upon a king, nobleman, etc.," originally "groom," probably from man (n.) + Old English hengest "horse, stallion, gelding," from Proto-Germanic *hangistas (cognates: Old Frisian hengst, Dutch hengest, German Hengst "stallion"), perhaps literally "best at springing," from PIE *kenku- (cognates: Greek kekiein "to gush forth;" Lithuanian sokti "to jump, dance;" Breton kazek "a mare," literally "that which belongs to a stallion").

Perhaps modeled on Old Norse compound hesta-maðr "horse-boy, groom." The word became obsolete in England but was retained in Scottish as "personal attendant of a Highland chief," in which sense Scott revived it in literary English from 1810. Sense of "obedient or unscrupulous follower" is first recorded 1839, probably based on a misunderstanding of the word as used by Scott.