Bucktrout Family History

From Middle English bukke ‘male of the fallow deer’ + a word trout perhaps related to Old French trout (a cry used to urge on hunting dogs) or to the verb troat trout ‘(of the fallow buck) to bellow at rutting-time’. Compare the definition in Cotgrave's Dictionary of French and English Tongues (1611): ‘Réer Rere to bellow as a Stag to trout as a Buck.’

However this is the earliest known use of the verb and there is no evidence for its use as a noun. Bardsley explains it as a compound of Middle English bukke ‘male (of the fallow deer)’ + trout ‘trout’ denoting the male of the fish.

But this seems a strange coinage and is unconvincing.