Egidio Boccanegra was the brother of Simone Boccanegra, the first Doge of Genoa. In 1340 Egidio led a force of Genoese troops in the service of the King of Castile in a war against Moroccan troops. The following year the king of Aragon appointed Egidio his admiral. Boccanegra was executed in Seville in 1367 because of his support for Henry II of Castile.