Michiel Adriaenszoon de Ruyter (24 March 1607 – 29 April 1676) is the most famous and one of the most skilled admirals in Dutch history.

De Ruyter is most famous for his role in the Anglo-Dutch Wars of the 17th century.

He fights the English and French in these wars and scores several major victories, the best known probably being the Raid on the Medway.

The pious De Ruyter is very much loved by his sailors and soldiers; from them comes his most significant nickname derived: Bestevaêr (older Dutch for 'grandfather'.)