Frederick I of Luxembourg, b. c 965, d. 1019, Count of Salm and Luxembourg; m. before 995, Irmentrude of Gleiberg, daughter of Herbert I, d. 992, Count in the Kinziggau, Count of Gleiberg, by his wife Irmentrude (Herbert I was son of Udo, Count in the Wetterau, by his wife a daughter of Herbert I, Count of Vermandois. [Ancestral Roots]