Frederick William Lillywhite was an English first-class cricketer during the game's roundarm era. One of the main protagonists in the legalisation of roundarm, he was one of the most successful bowlers of his era. His status is borne out by his nickname: The Nonpareil.

In cricket, roundarm bowling is a bowling style that was introduced in the first quarter of the 19th century and largely superseded underarm bowling by the 1830s. Using a roundarm action, the bowlers extend their arm about 90 degrees from their body at the point where they release the ball. Roundarm fell into decline after 1864 when the current style of overarm bowling was legalised, although W. G. Grace continued to use it to the end of his career.