Henry I, Duke of Guise

Henry I, Prince of Joinville, Duke of Guise, Count of Eu, sometimes called Le Balafré ('Scarface'), was the eldest son of Francis, Duke of Guise, and Anna d'Este. His maternal grandparents were Ercole II d'Este, Duke of Ferrara, and Renée of France. Through his maternal grandfather, he was a descendant of Lucrezia Borgia and Pope Alexander VI.

31 December 1550

Born on the same birth day (31 December): Alex Salmond • Baron Waqa • Bobby Byrne (baseball) • George C. Marshall • Gerry Dee • Giovanni Pascoli • Herman Boerhaave • John Frost (British Army officer) • Jonah Jones • Karl Kruuda • Mary Logan Reddick • Muhammad ibn al-Qasim • Ryo Aitaka • Shrilal Shukla • Toni Kuivasto • Tony Dorigo • Tyrone Corbin

Born in the same month (December 1550): Cesare Cremonini (philosopher) • García de Silva Figueroa • Man Singh I