Cosimo III de' Medici, Grand Duke of Tuscany
Federico Ubaldo married Claudia de' Medici in 1621 and was made Duke by his father. However, Federico died in 1623 from an epileptic attack, leaving only a daughter, Vittoria Della Rovere, wife of Ferdinando II de' Medici, Grand Duke of Tuscany; their child was Cosimo III de' Medici, Grand Duke of Tuscany; none of Cosimo III's children had heirs.