cox

English: variant of Cocke and Cook with genitival or post-medieval excrescent -s. Irish (Ulster): mistranslation of Mac Con Coille (‘son of Cú Choille’ a personal name meaning ‘hound of the wood’) as if formed with coileach ‘cock rooster’. Dutch and Flemish: genitivized patronymic from the personal name Cock a vernacular short form of Cornelius . Dutch: variant of Kok an occupational name for a cook. Amerindian (Mexico and Guatemala): Mayan name from a Castilianized form of a term denoting a species of pheasant-like bird.

Source: Dictionary of American Family Names 2nd edition, 2022