Franz Leopold Lafontaine

Franz Anton Leopold Lafontaine (14 January 1756 – 12 December 1812) was a military surgeon. He was known as the editor of the first Polish medical journal and for his work on catarrh.
Lafontaine was the maternal grandfather of Princess Julia of Battenberg. Through her, Lafontaine is an ancestor to Charles, Prince of Wales and other descendants of Prince Philip, Duke of Edinburgh in the British Royal Family, and also an ancestor to current members of the Spanish Royal Family, including King Felipe VI of Spain.