He is thought by some modern interpreters to have later had lordships in the Hesbaye (Dutch: Haspengouw) region, which is now in Belgium, in a part that mostly came to be incorporated into the later County of Loon (French: Looz).
There is one clear record of Rudolf, a 943 grant by his uncle Bishop Balderic of Utrecht, which was analysed by Léon Vanderkindere in his 1900 article.
[2] The places Rudolf stood to inherit an income from after his older brother were goods of the Abbey of "Hereberc" (Sint Odiliënberg): "Rura, Lithorp, Linne, Sulethum, Flothorp, Ascalon, Malicalieol en Curnelo", which are Roer, Lerop, Linne, Swalmen, Vlodrop, Asselt, Melick en Maasniel all near Roermond.
However, Baerten agreed that Rodulf in Bertha's witness list showed no clear sign of being a count in the area.
[7] Furthermore, both he and other writers such as van Winter, have pointed out that the distinction made by Vanderkindere and Baerten between the names Emmo and Ehrenfried is not necessary, as one is known to be a short form of the other.