Bibulus (Marcus Calpurnius Bibulus) bĭb´yo͝oləs [key], d. 48 BC, Roman statesman. The colleague in the consulship with Julius Caesar in 59 BC, he did everything in his power to block each move made by Caesar. A conservative republican, he was a strong partisan of Pompey . In 51 BC he was governor of Syria, and in 48 BC he died trying to halt Caesar in the Adriatic. His wife was Portia, daughter of Cato the Younger ; she later married Brutus .

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