Jacopo Casali
Jacopo Casali was the eldest-listed son of Ranieri II Casali, the first signore of Cortona, and is recorded as a condottiere. When his younger brother Bartolomeo succeeded to the signoria in 1351, Jacopo appears at first to have shared power with him before being pushed aside.
He then led a conspiracy against Bartolomeo, but the rising was crushed with considerable bloodshed; it was the last revolt against the Casali lords of Cortona in Bartolomeo's lifetime.