Old Irish eó

← Proto-Celtic *esoxs (inherited)

← Proto-Celtic *iwos (inherited)

← Proto-Indo-European *h₁eyHweh₂ (inherited)

← Middle Welsh ehawc (cognate)

→ Breton ivin (cognate)

→ French if (cognate)

→ Old French if (cognate)

→ Irish eo (inherited)

→ Irish eo (inherited)

→ Irish Í (cognate)

→ Scottish Gaelic eo (inherited)

→ Translingual Esox (cognate)

→ Norman if (cognate)