Old English ǣdre

→ English vein (mention)

→ English edder (inherited)

→ Old English Ædre (mention)

→ Old English heafodædre (compound)

→ Old English ædreseax (compound)

→ Middle English edre (derived)

→ Ancient Greek ἦτορ (cognate)

→ Old Norse æðr (mention)

→ Old Norse áðr (cognate)

→ Old Irish inathar (cognate)