John De Courcy Earl Of Ulster 
John's father was William De Courcy and his mother was Maud D' Avranches. His paternal grandparents were Robert De Courcy and Avice De Meschines; his maternal grandparents were William D' Avranches and Emma De Sap. He had a sister named Hawise. He died in 1219.
Details of John's family with Aufric Of The Isle Of Man
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