Sorely Boy was born in 1505, the general consensus is that it was at Dunaneanie Castle (Ballycastle). He died at the age of 85 at Dunaneanie Castle, a remarkable age for the turbulent times he lived in, his body was interred in Bonamargie Friary. Sorley had five brothers James, Colla, Angus, Alexander, Donal and several sisters. He belonged to the Scottish clan of the MacDonnells - an ancestor married Margery Bisset (Byset or MacEoin Byset) who was heiress to a large portion of land along the North Antrim coast and in the Glynns (Glens). James the eldest son inherited the title of 'Lord of Dunyveg and Antrim Glynns' but decided to return to his native Scottish Isles accompanied by his wife Agnes Campbell, he left Colla to rule the Glynns in his absence.