Warner Hassells was a portrait painter.

Hassells resided in London but was probably a native of Germany. He belonged to the school of Sir Godfrey Kneller

Godfrey Kneller

Sir Godfrey Kneller, 1st Baronet was the leading portrait painter in England during the late 17th and early 18th centuries, and was court painter to British monarchs from Charles II to George I...

, who painted his portrait in 1700. Hassells is known by a few portraits, which have been engraved including those of C. F. Fels (1690), and J. Witt (1701), a Frankfurt merchant, both in mezzotint

Mezzotint

Mezzotint is a printmaking process of the intaglio family, technically a drypoint method. It was the first tonal method to be used, enabling half-tones to be produced without using line- or dot-based techniques like hatching, cross-hatching or stipple...

 by J. Smith, and an anonymous portrait in line by P. Vauderbank. He also painted miniatures and in watercolours. he is wrongly described by Walpole as William Hassell. George Lambert

George Lambert

George Lambert may refer to:*George Lambert , played for Fitzroy Football Club in the early 20th century*George Lambert , English cricketer...

is stated to have been his pupil.