FREDERIC (-29 Jun 1091, bur [Canossa]). "Filia Wilelmi comitis de Burgundia Hermentrudis…" founded the Cluniac abbey of Froidefontaine by charter dated 8 Mar 1105 in which she names "suis antecessoribus…Lodewico, Sophia eius uxore, et filiis eorum Brunone, Theoderico, Lodewico, Friderico, filiabus vero Mathilde, Sophia, Beatrice…"[27]. The mid-12th century Genealogica ex Stirpe Sancti Arnulfi names "Theodericum de Monceons et Fredericum, fratres" as sons of "Sofia [filia Friderici ducis]"[28]. "Frederici filii Lodoici comitis…" subscribed the charter dated 29 Aug 1071 under which [his maternal aunt] "Beatrix comitissa ac ducatrix filia bon. mem. Federici ducis…ex natione mea lege vivere Saliga" donated property, for the souls of "Bonifacii marchionis atque ducis quodam viri mei…et…Matildæ filiæ meæ et…Gatefridi ducis quodam viri mei et…quodam Beatricis neptis meæ" to "monasterio…Frassinorum"[29]. Graf, Herr von Lützelburg und im Hagenau. He was a powerful lord in Swabia who supported Rudolf von Rheinfelden as anti-king of Germany. He arrived in Italy in 1070, accompanying his maternal aunt Beatrix Signora di Canossa and her daughter Matilda later Ctss of Tuscany who benefited from his military help during the succeeding years[30]. He was installed [17 Sep1079/May 1080] as Marchese di Susa by his [future] wife's paternal grandmother[31]. This presumably took place after the death in Jan 1080 of his wife's uncle Amédée II Comte de Savoie, who had succeeded his older brother as Marchese di Susa in 1078. The Chronicon of Bernold records that "Frederici comitis" the son of "domnæ Sophiæ et Ludowici comitis" died "1091 III Kal Iul" and was buried "sancti Pauli"[32]. Emperor Heinrich IV captured the marquisate of Tuscany by force in 1092. m (Turin May 1080) AGNES de Maurienne, daughter of PIERRE I Comte de Savoie & his wife Agnès de Poitou ([1066/70]-after 13 Mar 1110). "Adalasia comitissa cum nuru sua Agneta et filia eius Agnete" donated property to "ecclesiæ S. Mariæ…Astensis episcopatus" by charter dated 18 Jun 1089[33]. "Agnes filia Petri marchionis et relicta olim Friderici" donated property to the monastery of Cavorre by charter dated 1091[34]. Her birth date is estimated from the marriage date of her parents, her mother's estimated birth date, and the fact that Agnes herself gave birth to three children before her husband died in 1091. She became a nun after her husband died. She was still alive in 1100[35]. Pope Pascal II confirmed a donation to the monastery of Fruttuaria San Benedetto by "Agnete comitissa, Petri marchionis filia" by charter dated 13 Mar 1110[36]. Marchese Friedrich & his wife had three children