Jeronimus Cornelisz (c. 1598 – 2 October 1629) was a Dutch Frisian apothecary and Dutch East India Company merchant who sailed aboard the merchant ship Batavia. After the ship was wrecked on 4 June 1629, in the Houtman Abrolhos, a chain of coral islands off the west coast of Australia, Francisco Pelsaert, the expedition's commander, went to get help from the Dutch settlements in Indonesia, returning several months later.
While Pelsaert was away, Cornelisz led one of the bloodiest mutinies in history, for which he was eventually tried, convicted and hanged.

Cornelisz and his henchmen were responsible for the deaths of between 110 and 124 men, women, and children over a two-month period. Their victims were drowned, strangled, hacked to pieces, or bludgeoned to death singly or in large groups. Seven surviving women were forced into sexual slavery. The most attractive, Lucretia Jans, was reserved for Cornelisz.