Sir John Hayes, 1st Baronet

Sir John Macnamara Hayes, 1st Baronet (c. 1750 – 19 July 1809) was a military physician who served as physician-extraordinary to the George, Prince of Wales, the future George IV of the United Kingdom.

His grandfather, Daniel Hayes, of Mayvore, was a captain in the army at the Battle of the Boyne in the Nine Years' War.

[2] He became a doctor of medicine of Rheims on 20 March 1784 before being admitted a Licentiate of the College of Physicians on 26 June 1786.

In 1806, Hayes was appointed inspector-general of the ordnance medical department at Woolwich.

[8] After his death in 1851, he was succeeded by his brother John, who lived at Arborfield Hall.