English Kelleher

← Proto-Celtic *kēlyos (derived)

← Proto-Celtic *-ākos (derived)

← Irish Ó Céileachair (derived)

← Irish Céileachar (mention)

← Irish céile (mention)

← Irish -ach (mention)

← Proto-Indo-European [[*-eh₂kos]], [[*-eh₂ḱos]] (derived)

← Primitive Irish ᚉᚓᚂᚔ (derived)

← Old Irish céile (derived)

← Old Irish -ach (derived)