Udo

OTTO von Hammerstein (-[5 Jun] 1036). Thietmar names "Heriberti comitis filio Ottone" when recording that he was among those sent by Heinrich II King of Germany to Lombardy after his election to quell unrest[330]. The notice concerning the Hammerstein marriage dispute names (in its first part) "Gebehard et Udo nepotes, filii duorum fratrum. Gebehard genuit Cunonem. Udo genuit Ottonem. Cuno genuit Cunonem. Heribertus genuit Ottonem"[331]. Graf in der Wetterau 1016. Graf im Engersgau 1019. The necrology of Fulda records the death in 1036 of "Otto com"[332]. m IRMGARD, daughter of GODEFROI Comte de Verdun & his wife Mathilde of Saxony [Billung] ([970/85]-[5 Feb 1041/5 Jan 1043]). Thietmar records the excommunication of "nepos meus Oddo et uxor eius Irmirgerd, consanguinitate proxima iniuste diu coniuncti" in 1018, providing no details of the relationship between the two, and in a later passage their separation[333]. It is unlikely that Irmgard could have been born later than [985] in light of the known birth date of her mother in [942]. The validity of her marriage was challenged by the church on grounds of consanguinity, the dispute continuing for ten years before the marriage was finally accepted[334]. "Heinricus…rex" granted property "in villis Harive, Vals, Apine, Falchenberch…in pago Livgowe et in comitatu Dietbaldi comitis" to "Irmingardæ nepti nostræ" by charter dated 5 Feb 1041, on the petition of "ducum Gozelonis filiique sui Gotefridi"[335]. "Heinricus…rex" restituted property to Kloster Hersfeld "post obitum Hirmingarde comitissæ" which Emperor Konrad II had granted to Graf Otto, by charter dated 5 Jan 1043[336]. Otto & his wife had one child:

i) UDO (-1034). The primary source which confirms his parentage has not yet been identified. The necrology of Fulda records the death in 1034 of "Hutho com"[337].