Shown in some secondary sources as a son of Reccared I and an unknown mistress.
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Fredegar records that, before his accession, he "had won Cantabria, previously held by the Franks, for the Gothic kingdom".
He succeeded in 612 as SISEBUTO King of the Visigoths. Isidore of Seville records that Sisebuto ruled after Gundamaro for eight years and six months, "forced the Jews into the Christian faith" and "brought the rebellious Asturians under his dominion…overcame the Ruccones", adding that "some claim that he died a natural death, others that he died as a result of some medication". The Chronica Regum Visigotthorum records that “Sisebutus” reigned for eight years, eleven months and 16 days, otherwise six months.
The name of Sisebuto's wife is not known. 1