William de Marmion

William was born before 1241.  William's father was Robert V the Younger de Marmion and his mother is Avice de Tanfield.  His paternal grandparents were Robert IV de Marmion and UNKNOWN Philippa.  He was an only child.  He died before 1276.

‌William and Lorette were married in a religious ceremony in 1248.  They had a son named John.