[IDA de Mortagne . The Liber de Restauratione Sancti Martini Tornacensis names "Idam, filiam Everardi castellani Tornacensis" as wife of "Gualterus"[821]. The chronology for her parentage as reported in the Liber is very tight. Her paternal grandmother must have been born in [1107] at the earliest, while Ida apparently gave birth to ten children by her marriage, before her husband died in 1147. It would make more sense if Ida was the sister, not daughter, of Everard [II], assuming that she was related to this family at all. A charter dated to [1145] records commitments by the abbot of Anchin to the inhabitants of Avesnes and names "Gozewinus Avesnensis castri dominus [et] uxore sua Agnete…Walterus successor et nepos suus [et] uxore sua Ida et filio suo Teoderico"[822]. m GAUTHIER [I] d´Oisy Seigneur d´Avesnes, son of FASTRE [II] d´Oisy & his wife Richilde --- (-1147).]