Gemma Frisius

Gemma Frisius was a Dutch physician, mathematician, cartographer, philosopher, and instrument maker. He created important globes, improved the mathematical instruments of his day and applied mathematics in new ways to surveying and navigation. Gemma's rings, an astronomical instrument, are named after him. Along with Gerardus Mercator and Abraham Ortelius, Frisius is often considered one of the founders of the Netherlandish school of cartography, and significantly helped lay the foundations for the school's golden age.

9 December 1508

Born on the same birth day (9 December): André Milhoux • Ashleigh Brewer • Canibus • Fred Jones (rugby league) • Geoff Barrow • Jeff Petry • John Milton • Roxanne Swentzell • Roy Rubin (basketball) • Ryan Grant (running back) • Tip O'Neill • Wil Besseling • William Whiston

Born in the same month (December 1508): Pietro Carnesecchi