Rupert[1] (German: Ruprecht) was Vogt at Siegen and is one of the eldest known possible ancestors of the House of Nassau.
[4] It is possible that Rupert was already Count of Laurenburg, but he isn't mentioned as such in any charter.
[2] Perhaps Rupert was a son of Adelhart, who is mentioned in a charter from 1048 as Vogt at Haiger for the Abbey of Worms.
[5] There are more persons known who, as owners of the lands of Lipporn/Laurenburg (and thus the predecessors of Rupert), probably also were his ancestors.
The first is a certain Drutwin mentioned in 881 as a landowner in Prüm, and who is the oldest known possible ancestor of the House of Nassau.