He was the sixth son of Algernon Percy, second Baron Lovaine of Alnwick (1750–1830) and his wife Isabella Susannah Burrell.
Life
Entering the navy on board the 64 gun HMS Lion in May 1801 and going with it to China, he returned in November 1802 and was posted to the HMS Medusa (soon afterwards, his elder brother Josceline was appointed its appointed acting lieutenant). Promoted to commander in 1810, his first command was HMS Mermaid in 1811 (on troop transport duties between Britain and Iberia for the Peninsular War). Next he was made post captain on 21 March 1812, but his next command (of the 20 gun HMS Hermes during 1814-15, operating on the North American coast) came to grief when he lost 50 of his crew wounded or killed in an abortive attack on Fort Bowyer, Mobile and then had to set fire to his own ship to keep her out of enemy hands. This was his last naval service.
