Giacomo's father,
Domenico Fregoso, was elected doge of Genoa in 1370. Giacomo himself received an advanced education, became bachelor of law and joined the trading business of the Fregoso family. He also participated in the management of the
Maona of Chios. Following some commercial successes, Giacoma participated in the wars led by the Republic, in particular during the conquest of
Cyprus of 1373. Back in Genoa, his father gave him the charge of the defense of the Eastern
Riviera. When Domenico was toppled in 1378, the whole Fregoso family was driven into exile. He stayed away from Genoa under the following two dogeships of
Antoniotto Adorno and
Nicolò Guarco. He only returned in the city when the new doge
Leonardo Montaldo promulgated a law of amnesty in 1383. After his return, Giacomo managed to be elected repeatedly to the Council of the Ancients that governed the Republic and the doge Adorno put him in charge of the reception of
Pope Urban VI in the city. Later, he was also put in charge of diplomatic relations of the Republic with
Amedeo VII, count of Savoy. In the meantime, he kept on pursuing his economic activity, specifically with the Maona. ==Dogeship==