William Wyon
William Wyon RA (Birmingham 1795 – 29 October 1851), was official chief engraver at the Royal Mint from 1828 until his death.
He was the father of engraver Leonard Charles Wyon.
See Wikipedia.
Note: William was one of a dynasty of Wyons who became important die-engravers and medallists, starting with Peter George (II) Wyon who migrated to England from Cologne, Germany. See Wikipedia - Wyon family.