O'Hennessy, O'Morchain, Dillon, O'Kelly, De Barneval (Barnewall), and Newcomyn (Newcomen).

In 1307, the manor of Ballyfermot was held by William Fitzwilliam and his wife Avice, who leased part of it to Thomas Cantock, the Lord Chancellor of Ireland. The land passed from the Fitzwilliams to their relatives, the Clahulls from Dundrum, and later to the Barnawalls of Drimnagh Castle.