He was born to the nobleman Oddo Fortebraccio and Giacoma Montemelini at Perugia.[lower-alpha 1] He married Elisabetta Ermanni with whom he had three daughters. After her death in 1419, he married Niccolina Varano, who bore his first son Carlo in 1421. He later had a son out of wedlock, Oddo, who also became a condottiero.