LOUIS de Mousson ([1077/79]-murdered 1102). "Filia Wilelmi comitis de Burgundia Hermentrudis et filii sui Fridericus, Raginaudus, Theodericus" founded the Cluniac abbey of Froidefontaine by charter dated 8 Mar 1105 in which she names "suis antecessoribus…filiis autem Theoderici atque sue uxoris Hermentrudis, Lodewico, Wilelmo, Hugone"[85]. It seems unlikely that Louis de Mousson could have been born much later than [1077/79] bearing in mind his active participation in the First Crusade. Albert of Aix names "…Luodewicus de Monzunz…filius comitis Tirrici de Muntbiliarht…" among those who took part in the siege of Nikaia, dated to mid-1097 from the context[86]. William of Tyre names "Ludovicus de Moncons" among those present at the capture of Antioch in 1098[87]. Albert of Aix records that "comes de Oringis Reinboldus, Ludowicus de Monzuns, Lambertus filius Cononis de Monte Acuto" commanded one of the corps of men at the capture of Antioch in Jun 1098[88]. He returned to Altkirch before 1102, when he was killed by some of his own servants[89]. The Annales Einsidlenses record the death in 1102 of "Ludovicus comes de Montplicart" killed by his servants[90]. He was referred to as one of her deceased children in the 8 Mar 1105 document of his mother.