Arnould Ier De Guines
Arnould Ier was born in 1101.  He died at the age of 68 in 1169.

 Mahaud De Saint-Omer
Mahaud was born in 1115.  She died at the age of 54 in 1169.

 Baudouin II De Guines
Baudouin II was born about 1135.  He died on January 2nd, 1205.

 Béatrix De Guines
Béatrix was born in 1140.