In turn , his father Cosimo , furious , killed Garzia with his own sword .
Centuries after his death , a myth arose saying that Garzia had murdered his brother , Giovanni , following a dispute in 1562 .
Garzia 's father Cosimo , furious , Garzia Garzia with his own sword .
Centuries after his death , a myth arose saying that Garzia had murdered his brother , Giovanni , following a dispute in 1562 .