Thomas Stukley (or Stukeley, Stuckley, etc.; c. 1520 – 4 August 1578) was an English mercenary who served in combat in France, Ireland, and at the Battle of Lepanto, before his death at the Battle of Alcácer Quibir. It was alleged that he was an illegitimate son of Henry VIII of England. A Roman Catholic recusant, he also was a rebel against Queen Elizabeth I.