The story
- Old English · inherited from-oc
- Middle English · inherited fromfitlokes
- English todayfetlock
From Middle English fitlokes, feetlakkes pl, taken to be foot + lock (“tuft of hair”) but actually a misdivision of Old English -oc. Cognate with Middle Low German fitlok, fitlock (“fetlock”), Dutch vitlok, vittelokke, vitslok, German Fissloch, Fisloch, Fislach (“fetlock; pastern”).
Etymology from Wiktionary, CC BY-SA 4.0.