Research Notes:

The Chronicle of Alberic de Trois-Fontaines names "comitem Guilelmum de Luscelenburg…et Ermensendem…et Mathildem" as children of "Conrado comiti de Luscelenburch" and his wife Ermensende, specifying that Mathilde was "comitissam de Longui et de Homborc et de Castris" and that she was mother of "comitem Folmerum et sorores eius Helvidem, quam habuit comes Gerardus de Reneke dyocesis Herbipolensis et illam qua dux de Bronsviic genuit filiam, que in Sclavia hereditavit". It is improbable, from a chronological point of view, that Mathilde was the daughter of Conrad´s wife Clementia, assuming that the latter is the same person who is named in charters dated 1141. Considering that Mathilde´s son is named in 1087, it is unlikely that Mathilde herself could have been born much later than [1065]. If that is correct, Clementia would have been a centenarian when she died after 1141, which is unlikely. It is therefore probable that Mathilde was born from an earlier marriage of her father´s. ¹