Willebrord Snellius
Willebrord Snellius was a Dutch astronomer and mathematician, commonly known as Snell. His name is usually associated with the law of refraction of light known as Snell's law.
13 June 1580
Born on the same birth day (13 June): Alan Arnold Griffith • Carl Schmidt (chemist) • Jérôme Lejeune • Karin Swanström • Kenenisa Bekele • Mary-Kate Olsen • Norman Lloyd-Edwards • Sarah Connolly • Steve Georganas • Søren Rasted • Taejong of Joseon
Born in the same month (June 1580): Adriaen van Stalbemt • Daniël Heinsius