Guillaume, Comte de St omer
Abt 1157 - Yes, date unknown
Generation: 1
1. Guillaume, Comte de St omer was born about 1157; and died. Guillaume, married Ida de Avesnes. Ida (daughter of Nicolas de Avesnes and Mathilde de La Roche) was born about 1157 in Avesnes, Pas De Calais, France; and died. [Group Sheet]