WILLIAM de ST. OMER

WILLIAM de's father was WILLIAM I ST. OMER and his mother was AGANITRUDE von BRUGGE.  His paternal grandfather was BALDWIN de ST. OMER. He had a brother named ROBERT.  He died in 1143.¹ 

‌WILLIAM de and MELISINDE were married in a religious ceremony in 1084.¹   They had a daughter named MAUD de.