His daughter, Theodora, married Pandulf (or Landulf), lord of Capaccio (1040–1052), son of Guaimar III of Salerno and Gaitelgrima and brother of Guaimar IV, with whom he was assassinated.
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While Melus fled to Guaimar III of Salerno, Dattus looked to the protection of the Abbey of Montecassino, where he was aided by the Latin monks, and to Pope Benedict VIII, who loaned him papal troops to garrison a tower on the Garigliano, in the territory of the Duchy of Gaeta, then ruled by the anti-Byzantine Emilia.