Ronaldus de Boer is a Dutch former professional footballer who played as a right or attacking midfielder or right winger. He played for the Netherlands national team as well as a host of professional clubs in Europe. He is the twin brother of Frank de Boer.
Adapted from Wikipedia (CC BY-SA 4.0).
Dated facts from Wikidata; ages marked “about” come from year-only dates.
Every fact on this page traces to one of these.
Also born on May 15
Entrepreneur
1951 · United States
$15.6Bolder estimate, as of 2025 · Forbes
Nancy Walton Laurie is an American billionaire who is an heir to the Walmart fortune.
Entrepreneur · Aon plc
1937 · United States
$10Bolder estimate, as of 2025 · Forbes
Patrick George Ryan is an American billionaire insurance businessman. He is the founder and retired chairman and CEO of Aon. In 2010, he founded Ryan Specialty Group (RSG) as a holding company aimed at providing specialty services to insurance brokers, agents and carriers.
Flickr user andymiah, CC BY-SA 2.0, via Wikimedia Commons
Athlete
1997 · France
Masour Ousmane Dembélé is a French professional footballer who plays as a forward and right winger for Ligue 1 club Paris Saint-Germain and the France national team.
Bryan Berlin, CC BY-SA 4.0, via Wikimedia Commons
Athlete
1987 · United Kingdom
Sir Andrew Barron Murray is a British professional tennis coach and former player. He was ranked as the world No. 1 in men's singles by the Association of Tennis Professionals (ATP) for 41 weeks, including as the year-end No. 1 in 2016.
Brendan Dennis, CC BY-SA 4.0, via Wikimedia Commons
Scientist
1859–1906 · France
Pierre Curie was a French physicist and chemist, and a pioneer in crystallography and magnetism. He shared one half of the 1903 Nobel Prize in Physics with his wife, Marie Curie, for their work on radioactivity.
Dujardin, Public domain, via Wikimedia Commons
Author
1915–2009 · United States
Paul Anthony Samuelson was an American economist who was the first American to win the Nobel Memorial Prize in Economic Sciences.