Old Irish olc

← Proto-Celtic *ulkos (inherited)

← English ill (cognate)

← Proto-Indo-European *wĺ̥kʷos (derived)

← Latin ulcus (cognate)

→ Irish olc (inherited)

→ Scottish Gaelic olc (inherited)

→ Manx olk (inherited)

→ Old Armenian աղկաղկ (mention)