Old Irish trom

← Proto-Celtic *trummos (inherited)

← Welsh trwm (cognate)

→ Irish trom (inherited)

→ Irish trom (inherited)

→ Scottish Gaelic trom (inherited)

→ Galician trosma (cognate)

→ Manx trome (inherited)

→ Old Irish tromda (suffix)

→ Old Irish tromchride (compound)

→ Old Irish étrum (affix)

→ Old Irish trummae (mention)