Potentially going back again to the Germanic noun with varying ultimate consonants and inflectional course, whence Old Norse bikkja Sensible Vocabulary: related words and phrases Names for that male & female of animals billy goat boar boomer buck bull bullock cob doe drake drone ewe gelding hind mare sire https://archerpzirx.ampedpages.com/5-simple-statements-about-cock-explained-64100438