Ancestors of Cosimo I de Medici

Cosimo I de' Medici (June 12, 1519 [1] – April 21, 1574) was Duke of Florence, ruling from 1537 to 1574, and became the first Grand Duke of Tuscany. Cosimo was born in Florence, the son of the famous condottiere Giovanni dalle Bande Nere from Forlì. Cosimo came to power when Alessandro de' Medici was assassinated in 1537 because Alessandro's only male issue was illegitimate. He was from a different junior branch (il Popolani) of the family.

Ancestors in three generations

Cosimo I de ' Medici Grand duke of Tuscany See Descendants	Father	Paternal Grandparents	Paternal Great-Grandparents
	Lodovico de' Medici Giovanni dalle Bande Nere il Popolani Medici	Giovanni the Popolano il Popolani Medici	Pierfrancesco de' Medici (the Elder) il Popolani Medici
			Laudomia Acciaiuoli
		Caterina Sforza Countess of Forlì	Galeazzo Maria Sforza Duke of Milan
			Lucrezia Landriani
	Mother	Maternal Grandparents	Maternal Great-Grandparents
	Maria Salviati	Jacopo Salviati (1461–1533)	Giovanni Salviati (d. c.1470)
			Maddalena Gondi (1437–1503)
		Lucrezia di Lorenzo de' Medici (1470-c.1550) il Cafaggiolo Medici	Lorenzo de' Medici (1449–1492) il Cafaggiolo Medici
			Clarice Orsini

References

• "Ancestors of Cosimo I de' Medici, Duke of Florence", from Medieval Lands Project
• Descendants of Cosimo I de' Medici which maps how the Medici became part of the European Royal families, eventually leading to The Duke of Cambridge, future King of the United Kingdom et al. through the House of Stuart.