**Jefferyes Hamett O'Neale** (also spelled Jeffrey Hamet O'Neal or similar variants) was an Irish-born British artist renowned as one of the leading porcelain painters of the 18th century. Active primarily in London and associated with the Chelsea Porcelain Manufactory, he specialized in delicate enamel decorations featuring narrative scenes. His work helped elevate the artistic quality of English soft-paste porcelain during its golden age.
O'Neale worked at the Chelsea factory around 1755, where he produced some of the finest fable decorations on pieces such as tea services, plates, and bowls. These designs were often adapted from engravings of Aesop's Fables, rendered with lively figures, animals, and landscapes in a refined rococo style. He later moved to the Worcester porcelain works in 1767 or early 1768 before returning to London in 1770. In addition to porcelain, he painted miniatures and created satirical prints, exhibiting at the Society of Artists between 1763 and 1772 and contributing designs to pattern books like *The Ladies Amusement*.
Although details of his early training remain undocumented, O'Neale's technical skill and imaginative compositions made him a standout figure in British ceramic decoration. Notable examples of his attributed work include fable-patterned Chelsea saucers and services featuring scenes from literature or commedia dell'arte. His output bridged fine art and applied decoration, influencing the aesthetic of English porcelain.
O'Neale's legacy endures through the many surviving Chelsea and Worcester pieces bearing his distinctive hand, which continue to be prized by collectors and museums for their narrative charm and painterly finesse. He died in the early 19th century, leaving a lasting mark on the history of British ceramics.