Gauthier Ier D'avesnes 
Gauthier Ier was born in 1100. Gauthier Ier's father was Fastre II D'avesnes and his mother was Richilde N.... His paternal grandparents were Fastre Ier D'oisy and Ade D'avesnes. He was an only child. He died at the age of 47 in 1147.
They had a son and a daughter, named Nicolas and Pétronille.
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