Proto-Celtic *regeti

→ Irish éirigh (derived)

→ Irish athraigh (inherited)

→ Irish aithrí (derived)

→ Scottish Gaelic èirich (derived)

→ Scottish Gaelic àraich (mention)

→ Scottish Gaelic atharraich (inherited)

→ Manx arree (inherited)

→ Manx irree (derived)

→ Middle Irish éirgid (inherited)

→ Old Irish rigid (inherited)

→ Old Irish atreig (derived)

→ Old Irish téit (mention)

→ Old Irish adeirrig (derived)