Admiral Sir Edward Joseph Hamilton, 1st Baronet KCB was an officer of the Royal Navy, who saw service during French Revolutionary and Napoleonic Wars, eventually rising to the rank of admiral.

Captain Sir John Hamilton, 1st Baronet was a Royal Navy officer of the eighteenth century. He joined as a captain's servant in HMS Rippon in 1740. Hamilton fought in the War of Jenkins' Ear at the Battle of Cartagena de Indias in 1741 and then transferred to HMS Alderney where he participated in the unsuccessful Invasion of Cuba. He was promoted to midshipman in HMS Success in 1742, and was promoted to lieutenant while serving on HMS Tartar in 1747. Having served in a variety of ships as a lieutenant, Hamilton was promoted to commander in 1762. After initially commanding HMS Cormorant he served in HMS Zephyr and HMS Merlin on the Newfoundland Station before being promoted to post captain in 1766.