Wouter Loos was a soldier on board the Dutch East India Company ship Batavia, which sank on Morning Reef in the Wallabi Group of the Houtman Abrolhos Islands off the coast of Western Australia in 1629. Loos had a critical role in the subsequent Batavia Mutiny, becoming the leader of the mutiny after the original leader, Jeronimus Cornelisz (Corneliszoon), was captured.