Old Irish ocus

← Proto-Celtic *onkus-tus (inherited)

← Proto-Celtic *onkus (inherited)

← Old Irish icc (mention)

→ Welsh agos (cognate)

→ Irish agus (inherited)

→ Irish fogas (derived)

→ Scottish Gaelic agus (inherited)

→ Scottish Gaelic faisg (derived)

→ Manx as (inherited)

→ Middle Irish ocus (inherited)

→ Old Irish oc (cognate)

→ Old Irish cummae (mention)

→ Old Irish aicce (mention)