Porcia Catones (d. 42 BC) was a Roman woman, daughter of Marcus Porcius Cato, the younger and his first wife Atilia. Porcia was married first to Marcus Calpurnius Bibulus (her father's political ally), then to Marcus Junius Brutus, her first cousin. She committed suicide after Brutus' death in the battle of Philippi, reputedly by swallowing live coals. She was introduced (under the spelling Portia) by Shakespeare in Julius Caesar.