According to a conjecture by Karl Hopf, he married first with a daughter from the first marriage of George I Ghisi, Lord of Tinos and Mykonos; however this hypothesis is rejected by Loenertz.[1]
In 1324, Peter is attested as lord of half of the Barony of Arcadia in the Principality of Achaea, and it is usually assumed that this came about as a result of a second marriage to Balzana Gozzadini, the widow of Baron Erard II of Aulnay. Balzana died soon after.[2]
He died in 1340 and he was succeeded by his son Giovanni, who was the only son of the second marriage.
References
^R-J Loenertz, Les Ghisi, dynastes vénitiens dans l'Archipel (1207-1390) (1975), p. 107