The story
- Proto-Indo-European*h₂en-
- Proto-Germanic*an
- Proto-West Germanic*ana
- Old Englishon
- Middle Englishan
- Middle Englisha-
- Englisha-
- Proto-Germanic*keukô
- Proto-Germanic*kukkaz
- Proto-West Germanic*kokk
- Old Englishcocc
- Middle Englishcok
- Englishcock
- English todayacock
Etymology from Wiktionary, CC BY-SA 4.0.