Sir James Lucas Yeo,, was a British naval commander who served in the War of 1812. Born in Southampton, he joined the Royal Navy at the age of 10 and saw his first action in the Adriatic Sea. He distinguished himself in combat multiple times, most notably during the Portuguese conquest of French Guiana, earning knighthoods in the Portuguese Order of Aviz and the British Order of the Bath. He was given command of the frigate Southampton, in 1812, but his ship was wrecked in the Bahamas although he was acquitted of blame for its loss. Yeo was then given command of the squadron on Lake Ontario and commanded it during several engagements with the Americans.

The Military Order of Saint Benedict of Aviz, previously to 1910 Royal Military Order of Saint Benedict of Aviz, previously to 1789 Knights of Saint Benedict of Aviz or Friars of Santa Maria of Évora, is a Portuguese order of chivalry, founded in Portugal in 1146. It gave its name and coat of arms to the Aviz Dynasty that ruled Portugal between 1385 and 1580.