Duncan Earl of Mar

Duncan was born in 1153 in Aberdeenshire, Scotland.  Duncan's father was Morgund Earl of Mar and his mother is Agnes Countess of Mar.  His paternal grandfather is Gillocher Earl of Mar. He had five brothers named Malcolm, James, Donald, David and John.  He was the third oldest of the six children.  He died at the age of 89 in 1242.

He had a biological son named William.