The Flandria Generosa specifies that "frater Philippi secundus natu Matheus" had two daughters by his wife "comitissam Boloniensem", specifying that the older daughter (unnamed) married "Rainaldo comiti de Danmartin" against the wishes of her friends. The Chronicon Hanoniense names "Idam…et Mathildem" as the two daughters of "Matheus [comiti Boloniensi]" & his wife, specifying that Ida married "primus…Gerardo comiti de Ghelra, deinde Bertoldo Cheringiorum duci, postea Rainaldo comiti Dommi-Martini in Francia". Her first marriage is confirmed by the undated charter under which "Ida comitissa Boloniensis" donated "decimam Alulfi de Ales…in parrochia de Salquele" to Andres, "per manum meam et virorum meorum bonæ memoriæ comitum Boloniensium, Matthei scilicet et Geraldi de Gelre".
She succeeded her father in 1173 as Ctss de Boulogne. The Annales Egmundani record the marriage in 1181 of "filiam comitis Boloniæ Mathei" and "comes Gelrensis…Gerardus" and his death later the same year, specifying that his widow took away by force everything which had been granted to her at the time of the marriage. The date of her fourth marriage is indicated by the charter dated 1185 under which "Albericus comes Domni Martini et Raynaldus filius meus comes Boloniæ et Matildis uxor mea comitissa" donated property to Dammartin Saint-Pierre, demonstrating that Ida´s husband already bore the title comte de Boulogne at that date. However, this date is inconsistent with the date of death of Ida´s third husband, estimated to be 8 Sep 1186, which suggests that either the charter is misdated or that Berthold Herzog von Zähringen died a year earlier.
The Chronica Andrensis records the death in 1216 of "Ida Bolonie comitissa in Flandria" and her burial at Boulogne. 1
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