Nancy Perriam (born Ann Letton) (1770 – 1867) was an English woman from Exmouth, Devon, who was one of the few women of her time to serve on a warship. Perriam was allowed to sail on HMS Orion, one of the few women permitted to accompany their husbands. She and her husband, Edward Hopping, served Sir James Saumarez on several ships. They served on HMS Orion for five years, including during action in L'Orient (1795) and Cape St Vincent (1797). Her official role was to mend the captain's shirts, but she also played the role of the Powder Monkey and assisted the surgeons with his operations, including amputations, including during the Battle of the Nile.