In the late Middle Ages, Antrim was divided into three parts: northern Clandeboye, the Glynnes and the Route. The Cambro-Norman MacQuillans were powerful in the Route. A branch of the O'Neills of Tyrone migrated to Clandeboye in the 14th century, and ruled it for a time. Their family was called O'Neill Clannaboy. A Gallowglass sept, the MacDonnells, became the most powerful in the Glynnes in the 15th century.