Lucius Piso, legate killed with Cassius
Person
Gallic War 1.12 supplies the first indexed source portrait: “… In this Caesar avenged not only the public but also his own personal wrongs, because the Tigurini had slain Lucius Piso the lieutenant [of Cassius], the grandfather of Lucius Calpurnius Piso, his [Caesar's] father-in-law, in the same battle as Cassius himself.”
Passage-specific disambiguation; see the public identity-rule register.
Gallic War 1.12
Caesar
… In this Caesar avenged not only the public but also his own personal wrongs, because the Tigurini had slain Lucius Piso the lieutenant [of Cassius], the grandfather of Lucius Calpurnius Piso, his [Caesar's] father-in-law, in the same battle as Cassius himself.