daughter ([970/85]-). The parentage of the wife of Graf Friedrich is suggested by the Vita Adelheidis which names "Irminthrudis, Alverad [et] Berthrada" as the three sisters of Adelheid, and daughters of "Megengoz" and his wife, specifying that Irminthrudis was grandmother of [three of the sons of Graf Friedrich, shown below] "Heinrici magnifici ducis et Adhelberonis Metensis episcopi, Friderici ducis"[329]. The possibility of this person´s earlier otherwise unrecorded marriage is suggested by the Genealogia Welforum which names [this person´s daughter] "Salice---de Glizperch Imizam nomine, Heinrici Noricorum ducis sororem et Friderici ducis Lotharingorum et Alberonis Metensis episcopi" as wife of Welf [II] Graf von Altdorf (see below)[330]. The reference to “Glizperch” represents the earliest indication of a relationship between the Luxembourg family and the Grafen von Gleiberg (see the document FRANCONIA NOBILITY). One possibility is that the wife of Graf Friedrich was heiress of Gleiberg. However, Irmtrud/Imiza is the only one of the siblings shown below in relation to whom a reference to Gleiberg has been found. This raises the interesting possibility that Irmtrud/Imiza, while sharing the same mother as the three brothers named in the Genealogia Welforum, may have been born from a different father who presumably held Gleiberg. It should be emphasised that this suggestion is highly speculative. Another indication of a Gleiberg/Luxembourg family connection is provided by Bernold´s Chronicon which records in 1059 that “Fridericus et fratres eius de Glichberga” rebelled against “Heinrico regi”[331]. It is not known which of Friedrich´s brothers may have been “von Gleiberg”. Another possible indication of the family origin of the wife of Graf Friedrich is provided by the Chronicle of Alberic de Trois-Fontaines which records that "comes Letardus de Longui pater Manegaudi et Gislebertus comes de Luscelenburch" were "nepotes" of Emperor Konrad II[332]. The precise family relationships between these three persons have not been traced, but it is possible that Giselbert was related to the emperor through his mother´s family, which had many Franconian connections. [m firstly --- von Gleiberg, son of ---.] m [secondly] FRIEDRICH Graf im Moselgau, son of SIEGFRIED Comte [de Luxembourg] & his wife Hedwig --- (-6 Oct 1019).