Gislebert's life is not well-documented. Grandfather Rudolf may have been his father. Mother Luitgarde may have been Gislebert's wife. Daughter in law Suanhilde may have been his wife. Granddaughter Sophie may have been a daughter.
|Offspring of Gislebert van Loon and Erlande van Geldenaken (?-?)|
|Emmon van Loon (?-1078)||1078|| Swanhilde van Holland (?-?)|
|Otto de Duras (c1020-1101)||1020||1101|| Oda de Duras|
|Herman van Gronsveld (c1035-c1082)||1035||1082|