Cosimo I de' Medici

Cosimo I de' Medici was the second duke of Florence from 1537 until 1569, when he became the first grand duke of Tuscany, a title he held until his death.

12 June 1519

Born on the same birth day (12 June): Aivar Kuusmaa • Andranik Margaryan • Carl Hovland • Edmond Hébert • Emperor Gaozong of Song • Jamil Jalibi • John Wetton • Raúl Héctor Castro • Shonica Wharton • Watson Fothergill

Born in the same month (June 1519): Andrea Cesalpino • Henry FitzRoy, Duke of Richmond and Somerset • Theodore Beza