The coming of the Normans
The Normans invaded Ireland 100 years after they conquered England.
There were never many Normans in Ireland and they quickly married into leading Gaelic families and adopted Irish ways. It was said that they became "more Irish than the Irish".
John de Courcy invaded county Down which is marked Uliad on this map. The leading family there were the MacDuinnsleibe or MacDunlevy which were a branch of the O'hEochaidh or Hoys.
By this time, most of the O'hEochaidh had moved to county Louth which was controlled by the UaCerbaill or O'Carrolls.
It was Bertram de Verdon who invaded Louth and the Babes who built Darver castle would have been in his company.
After the initial invasion, the Norman-Gaelic families were among the leaders in the fight against the English. One of the leaders of the United Irishmen's Rebellion of 1798 was Napper Tandy. He was hidden in Darver Castle until he escaped to the United States.