英语词源字典 - 在线词源网站

Bayard (n.)[Bayard 词源字典]: generic or mock-heroic name for a horse, mid-14c., from Old French Baiard, name of the bay-colored magic steed given by Charlemagne to Renaud in the legends, from Old French baiart "bay-colored" (see bay (adj.)). Also by early 14c. proverbial as a blind person or thing, for now-unknown reasons. The name later was used attributively of gentlemen of courage and integrity, in this sense from Pierre du Terrail, seigneur de Bayard (1473-1524), French knight celebrated as Chevalier sans peur et sans reproche. The surname is perhaps in reference to hair color.[Bayard etymology, Bayard origin, 英语词源]
doughty (adj.): Old English dohtig "competent, good, valiant," from dyhtig "strong," related to dugan "to be fit, be able, be strong," and influenced by its past participle, dohte.

All from Proto-Germanic *duhtiz- (cognates: Middle High German tühtec, German tüchtig, Middle Dutch duchtich), from PIE *dheugh- "to be fit, be of use, proper" (cognates: German Tugend "virtue," Greek teukhein "to make ready," Irish dual "becoming, fit," Russian dužij "strong, robust"). Rare after 17c.; in deliberately archaic or mock-heroic use since c. 1800. If it had survived, its modern form would be dighty.
mock (adj.): 1540s, from mock, verb and noun. Mock-heroic is attested from 1711, describing a satirical use of a serious form; mock-turtle "calf's head dressed to resemble a turtle," is from 1763; as a kind of soup from 1783.