1) Anglicised Irish surname 
McCaul, also spelt MacCawell, is an Irish surname, derived from the Gaelic Mac Cathmhaoil, meaning the `descendants of Cathmhaol`. The name Cathmhaoil itself is derived from cathmhaol which means `battle chief`. The Mac Cathmhaoil where a sept of the Cenél Fearadhaigh, of the Uí Néill, and where based around Clogher in modern day County Tyr...