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Male Louis Brienne Click to view Louis Brienne in the family tree

Louis was born about 1265 in De Acre, Acre, Jerusalem, Palestine.1   Louis' father was Jean Count De Brienne and his mother was Berengaria Alfonsez Princess Leon.  His maternal grandfather was Alfonso IX Fernandez Leon. He had two brothers named Alphonse De and Jean De.  He was the youngest of the three children.1 

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