He married Hodierna of Gommetz, (Dame) . Hodierna of Gommetz, (Dame) was born at Abt 1014 daughter of William de Gometz and .
They were the parents of 5
children:
Guy de Montlhery
born Abt 1037.
Elizabeth de Montlheri
born Abt 1041.
of Montlhery
born Abt 1035.
Guy II
born Abt 1050.
Melisande of Montlheri
born Abt 1058.
Guy I died 1095 .
Hodierna of Gommetz, (Dame) died 7 Dec 1074 .