Don Francesco Maria Marescotti, Principe Ruspoli (March 5, 1672 – July 14, 1731) was the 6th Count of Vignanello and Parrano and 1st Prince of Cerveteri.

He was a son of Alessandro Ruspoli, 5th Count of Vignanello and his first wife Anna Maria dei Marchesi Corsini.

Also he was a paternal grandson of Sforza Vicino Marescotti, 4th Conte di Vignanello and his wife Vittoria dei Principi Ruspoli dei Marchesi di Cerveteri (?

In 1709, Pope Clement XI conferred on him the noble title of Principe di Cerveteri (Prince of Cerveteri), for himself and his descendants, this for donating the Ruspoli Regiment in the War of Comacchio against Austria.

[1] He married Isabella Cesi dei Duchi di Acquasparta (1676 – November 10, 1753), maternal niece of Pope Innocent XIII, by whom he had nine children: