Old Irish óen

← Proto-Celtic *oinos (inherited)

← Proto-Indo-European *óynos (inherited)

→ Irish aon (inherited)

→ Irish aonar (mention)

→ Irish aontumha (mention)

→ Irish aontaigh (mention)

→ Irish aonach (mention)

→ Irish Aontroim (derived)

→ Irish éineacht (mention)

→ Scottish Gaelic aon (inherited)

→ Scottish Gaelic aontaich (mention)

→ Scottish Gaelic aonar (mention)

→ Ancient Greek οἴνη (cognate)

→ Manx unnane (inherited)

→ Latin unus (cognate)

→ Middle Irish óen (inherited)

→ Norwegian Bokmål aberdeen angus (mention)

→ Old Irish óenmad (mention)

→ Old Irish óentu (affix)

→ Old Irish oínfer (affix)

→ Old Irish óenar (affix)