sentences:  Nephew and successor of Hugh III, he was a minor upon his succession and was under the tutelage of his mother Eleanor.He was born at Castel Genovese (modern Castelsardo) in 1377 to Eleanor and Brancaleone Doria, a Genoese nobleman.In 1382, Eleanor was residing in Genoa, where she made a pact with the Doge Nicolò Guarco that loaned him 4,000 florins and promised Frederick in marriage to the doge's daughter Bianchina.