Gilbert de GANT
Gilbert de was born before 1050 in Ghent, Flaners, Belgium.  He died in 1131.

 Alice de MONTFORT
Alice de was born in 1060 in Monfort, Normandy, France.

 Walter de GAUNT
Walter de was born in 1087 in Folkingham, Lincolnshire, England.  He died at the age of 52 in 1139.