Gaelic variation: O’Suilleabhain: “one-eyed” or “hawk-eyed”.

Anglicised variations: O’Sullivan.

The O’Sullivan clan is an ancient family that emerged as the ruling class of a small, wandering tribe of warrior Celts now called the ‘Gaels’. It is thought that the tribe originated in the Fertile Crescent, immigrated to the steppes of the Caucasus Mountains, fought [...]