WILLIAM I de BETHUNE

WILLIAM I was born about 1100.¹   WILLIAM I's father was ROBERT IV de BETHUNE and his mother was ALICE de PERONNE.  His paternal grandfather was ROBERT III de BETHUNE; his maternal grandfather was ROBERT II de PERONNE.  He was an only child.  He died in 1144.¹ 

They had a son and a daughter, named ROBERT V and MAUD.