Wauthier de Oisy 
Wauthier was born about 1105 in Oizy, Namur, Belgium. Wauthier's father was Fastre de Oisy and his mother was Richilde Unknown. His paternal grandparents were Fastre de Oisy and Ada de Avesnes. He was an only child. He died in 1147.
Details of Wauthier's family with Ada de Mortaigne
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