Another word for simpleton

There were not wanting those who insinuated that Galileo intended to depict the pope himself in the guise of the simpleton of the party; and the charge, though preposterous in itself, was supported by certain imprudences of expression, which Urban was not permitted to ignore.
As an eniracte, from April 1649 to January 1650, came the affair of the Fetus Maitre:: Cond, proud and violent; Gaston of Orleans, pliable and contemptible; Conti, the The simpleton; and Longueville, the betrayed husband.
The simpleton or slow-witted man.

What's another word for simpleton?