The genealogy of the family is complicated by numerous illegitimate offspring and by the tendency of some of the members to dispose of each other by assassination. The first important member was Giovanni di Bicci de' Medici (1360–1429). His elder son, Cosimo, founded the senior line, which included Piero (1416–69); Lorenzo (Lorenzo il Magnifico); Piero (1471–1503); Pope Leo X; Giuliano, duke of Nemours; Lorenzo, duke of Urbino; Catherine de' Medici, queen of France; Ippolito de' Medici; Alessandro de' Medici; and Pope Clement VII. Giovanni di Bicci's younger son, Lorenzo (d.1440), founded the younger line, which included Lorenzino; Giovanni (delle Bande Nere); and the grand dukes of Tuscany—Cosimo I, Francesco (whose daughter was Marie de' Medici), Ferdinand I, Cosimo II, Ferdinand II, Cosimo III, and Gian Gastone, last of the line.
See separate articles on the most important members of the family.
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