"Filiumque suum rex Arnulfus…nomine Tuendebolebum" in named in the Annales Vedastini. Regino records that, when Arnulf King of the East Franks granted "ducatum Behemensium" to "Zuendiboldo Marabensium Sclavorum regi", his son was baptised with "nomine suo Zuendibold". Regino records that "Arnolfi Zvendiboldo filio" was given the honours of "Megingaudi comitis" in 892.
He was installed as ZWENTIBOLD King of Lotharingia in May 895 by his father, crowned [14/30] May. "Zendeboldus…rex" signed 28 charters between 895 and 900. His position in Lotharingia was seriously weakened after 898 when he quarrelled with Graf Reginar who was one of his main supporters. He was deposed on the death of his father in 899 and replaced by his legitimate half-brother.
He was killed trying to recapture his kingdom. Regino specifies that "Zuantibold" was killed in battle "900 Id Aug" by "comitibus Stephano, Gerardo et Matfriedo circa Mosam". The necrology of Prüm records the death "901 Id Aug" of "Zuindibolt in prælio interficitur". 1
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