Question: Who is Margaret Of Guelders (1436–1486)'s father?
Sentence (from "Reginald III, Duke of Guelders"): As he did not have a legitimate child, the succession passed to his sisters: Mathilde( also, Machteld), who was married to John II, Count of Blois, and Maria, wife of William II of Jülich and mother to William I of Guelders and Jülich, on whose behalf she claimed the throne of Guelders.
Relevant evidence: No