Born at Todi, he was a friend of Pope Gregory VII and defender of his reformation measures. Deusdedit joined the Benedictine Order and became a zealous promoter of ecclesiastical reforms in the latter half of the eleventh century.
- Zimmermann, Harald (1991). "Deusdedit". Dizionario Biografico degli Italiani. 39. Rome: Istituto dell'Enciclopedia Italiana.
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