←
Old English eder (inherited)
←
Old English edor (mention)
←
Old English ǣdre (inherited)
←
English adder (mention)
←
Middle English *edre (inherited)
←
Middle English *eder (mention)
←
Middle English edre (inherited)
←
Proto-Germanic *edaraz (inherited)
←
Proto-West Germanic *ādrā (inherited)
←
Old High German etar (cognate)
←
Old High German ādra (cognate)
←
Ancient Greek ἦτορ (cognate)
←
Old Norse æðr (cognate)
→
English atman (doublet)
→
Cimbrian aadar (cognate)