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What name did Pope Innocent III use before becoming pope?
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Innocent III
Innocent III, fresco in the Abbey of San Benedetto, Subiaco, Italy.
Before becoming Pope Innocent III, he was known by the name Lothar (or Lothair). He was the son of Trasimund, count of Segni, and was elected to the papacy on January 8, 1198, at which time he took the name Innocent III.1