Rainbow was a galleon of the English Tudor navy, built at Deptford Dockyard by Peter Pett (the first of that name in this extensive family), and launched in 1586. Commanded by Lord Henry Seymour, a younger son of Edward Seymour, 1st Duke of Somerset by his second wife Anne Stanhope, she fought against the Spanish during the Singeing the King of Spain's Beard and the Spanish Armada, including the Battle of Gravelines in 1588.