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Male Guillaume De Lusignan Valence Click to view Guillaume De Lusignan Valence in the family tree

Guillaume De was born in 1225 in Cistercian Abbey, Valence, Charente, France.1   Guillaume De's father was Hugh (Hugues) X Lusignan and his mother was Isabella De Taillefer.  His maternal grandparents were Aymer De Taillefer and Alix De Courtenay. He had four brothers and four sisters, named Hugh Xi De, Guy De, Geoffrey De, Aymer Ademar De, Alice, Isabella De, Marguerite De and Agatha Agnes De. He had two half-brothers and three half-sisters, named Henry, Richard Prince Of, Joane Princess Of, Isabel Princess Of and Eleanor Princess Of.  He died before May 18th, 1296.1 

1 phelps1609.FTW
Further source/citation:
World Family Tree Vol. 16, Ed. 1 @ Tree #1609