Peerage and military service
John Blount was the second son of Walter Blount, 1st Baron Mountjoy, and Helena Byron. He inherited the Mountjoy barony after the death of his nephew Edward.
He held offices in the Pale of Calais, including Lieutenant of Hammes and Constable of Guînes, and was knighted in 1478. His wife was Lora Berkeley, and their children included William Blount, later 4th Baron Mountjoy.
The next generation gives the clearest Barton connection: William Blount, 4th Baron Mountjoy, was born at Barton Blount.