Guillaume De Courtenay

Guillaume De was born about 1170 in of, Courtenay, Galinois, France.¹   Guillaume De's father was Pierre Prince of France and his mother was Isabelle (Elizabeth) De Courtenay. He had four brothers and six sisters, named Pierre II De, Robert De, Philippe De, Jean De, Daughter De, Alix De, Eustachia De, Clementia De, Daughter and Constance De.  He was the fourth youngest of the eleven children.