• Married: Abt 900
• Died: 11 May

  Research Notes:

The wife of Theoderich is named "Reinhildam, Danorum Fresonumque germine procreatam" in the Vita Mathildis Reginæ. According to Europäische Stammtafeln, she was Reinhild, daughter of Gotfrid the Dane & his wife Gisela [Carolingian], which is presumably a guess based on this description in the Vita Mathildis. However, the chronology is not ideal. Regino records the marriage in 882 of "Gisla filia Hlotharii" and "rex Godofridus Nordmannorum". If this couple's daughter was the mother of Queen Mathilde, the latter's estimated birth date would need to be pushed forward by several years, which makes the chronology for her known descendants tight. A better fit may be Reginlind, [sister of Bovo Bishop of Chalons, daughter of ---]. The known sister of Bishop Bovo was Frederuna, wife of Charles III "le Simple" King of the Franks. The hypothesis that there was another sister married to Theoderic would explain (1) the name Frederuna being transmitted to Regenhild's daughter, and (2) Berenger Bishop of Cambrai, recorded elsewhere as nepos of Queen Frederuna, being described as "…Ottonis imperatoris proxime consanguineus" in the Gesta Episcoporum Cameracensium. If this is correct, the reference to Reginlind being "Danorum Fresonumque germine procreatam" has not been explained. A list of names in the Libri Confraternitatum Sancti Galli sets out (in order) "Thieterich, Reginhilt, *, Oto, Amalrat, Perectheid, Friderun, Pia", immediately after a list of family members of Heinrich I King of Germany and his wife, which no doubt refers to the latter's parents and sisters, "Oto" being the only person not so far identified. The list is undated but was presumably written during the period [929/36] as King Heinrich's son-in-law Duke Giselbert is included (married in [928/29]) but not his son-in-law Hugues Duc des Francs (married in 937). ¹