John Deval (1701–1774) was an 18th-century British sculptor and Master Mason, as was his namesake son (1728–1794). He was Chief Mason to the Crown and was the mason for the Tower of London and Royal Mews.
Around 1750 he became Master Mason to the King and in 1760 he became Master of the Worshipful Company of Masons in London, the highest position a mason could reach.
He died in 1774 and was buried at Isleworth.[1]: 128
John Deval the younger
Born in 1728 he trained under his father and became Master Mason to the King in 1774 and in 1784 followed in his shoes as being made Master of the Worshipful Company of Masons.[1]: 129