Wegener refers to a document dated [987] which concerns property in the county of Meginhard "an der Mangfall", which suggests that Graf Meginhard succeeded Graf Poppo [I] in the area and was possibly his son. According to the 14th century Genealogia comitum Neuburgensium sive Formbacensium, "Udalricus senex comes genuit sex filios Arnoldum, Piligrimum, Brunonem, Tyemonem, Chounradum clericum Salzburgensem prepositum, Meginhardum" and "Meginhardus frater senioris Tiemonis genuit Oudalricum, Hermannum provincie comitem et Chunradum", the last named capturing Rome in the name of Heinrich IV King of Germany.
Vogt von Benediktbeuern. Graf an der Mangfall 987. 1