attempt to work in area #2:
-https://de.wikipedia.org/wiki/Gebhard_im_Lahngau (ENG poor)
-CLONE OF Gebhard d'Orléans, count of the Lahngau
-http://fmg.ac/Projects/MedLands/FRANKISH%20NOBILITY.htm#Gebharddied...
b) [GEBHARD (-after 879). Jackman suggests that Gebhard (ancestor of the Konradiner) was the brother of Ermentrude, first wife Charles II "le Chauve" King of the West Franks, therefore the son of Eudes Comte d'Orléans[141]. However, this appears chronologically dubious if Gebhard is identified with "Gebehardus" who founded Kloster Kettenbach, as recorded in the charter of "Ludowicus…rex" dated 31 Mar [845] in which the king donated land in "in pago Logonense iuxta fluvium Arda" to the monastery[142], unless he was born from an earlier marriage of his father. Nevertheless, an interesting possible corroboration for Gebhard's relationship with this family is provided by the Annales Bertiniani which record that "Adalardo Yrmintrudis reginæ avunculo" was "propinquo" of the brothers Udo (ancestor of the Franconian Konradiner family), Berengar and Waldo who were expelled from Germany in 865[143], and in a later passage that "Adalardo…et suis propinquis Hugonis et Berengario" fought the Vikings in 865[144]. "Adalardo" was Adalhard [III], maternal uncle of Gebhard assuming the relationship is as shown here, and the brothers Udo, Berengar and Waldo were Gebhard's sons.
m --- [im Nordgau], sister of Graf ERNST, daughter of ---. The relationship between the sons of Gebhard and Graf Ernst is clarified by the Annales Bertiniani which record that "nepotes ipsius [Ernestus]" were expelled from the kingdom in 861[145]. If the suggestion by Jackman concerning Gebhard's affiliation is correct, Gebhard would have been the brother-in-law not brother of Ernest, married to the latter's sister.]
- GERMANY, EARLY NOBILITY.