Marino Gradenigo
Marino Gradenigo (c. 1250–c. 1283) was a Venetian noble, a son of the admiral Marco Gradenigo and brother of Doge Pietro Gradenigo. He sat several times in the Minor Council and Senate, and was twice Duke of Candia, in 1278–1280 and 1282–1283.
He died on Crete during his second term and was buried in the church of San Marco at Candia. With his wife Maria Dandolo, said to be a daughter of Doge Giovanni Dandolo, he left at least four sons; one of them, Giovanni, was elected doge in 1355.