←
Old English ǣdre (cognate)
←
Proto-Germanic *ēdrô (inherited)
←
Proto-Germanic *ēdraz (mention)
←
Proto-Germanic *airiz (inherited)
←
Proto-Norse *āriʀ (inherited)
←
Old High German ātar (cognate)
←
Old Frisian ēdre (cognate)
←
Old Saxon ādro (cognate)
→
Faroese áður (inherited)
→
Icelandic áður (inherited)