Dictionary of National Biography, 1885-1900/O'Neal, Jeffrey Hamet
O'NEAL, JEFFREY HAMET (fl. 1760–1772), miniature-painter, was a native of Ireland. He practised for many years in London as a miniature-painter, and exhibited occasionally with the Incorporated Society of Artists, of which he was a fellow, being one of the artists who signed the declaration roll in 1766. O'Neal is also stated to have painted landscapes, natural history, and ‘Japan’ pieces, the last for a printseller in Cheapside. In 1772 he was living in Lawrence Street, Chelsea.
[Pasquin's Artists of Ireland; Graves's Dict. of Artists, 1760-1880; Catalogues of the Soc. of Artists.]