In Assassin's Creed II, what is the name of Ezio Auditore's older brother?

In Assassin's Creed II, Ezio Auditore's older brother is Federico Auditore.

Federico is the eldest of Giovanni Auditore's sons and appears early in the Florence chapters. He and Ezio share a playful rivalry, including a race across the rooftops before the family tragedy changes Ezio's life.

Federico is executed alongside his father Giovanni and younger brother Petruccio after the Auditore family is falsely accused of treason. This event becomes the immediate personal reason for Ezio's pursuit of the Templars and his gradual transformation into an Assassin.

The Auditore family includes Giovanni, Maria, Federico, Ezio, Claudia, and Petruccio. Mario Auditore is Ezio's uncle, not his brother. The game begins in Florence in 1476 and later moves through other Italian locations, including Venice and Forlì, during Ezio's long campaign.