What is "hartnoll"

Hartnoll is an English surname. Notable people with the surname include:

• Paul Hartnoll (born 1968), British musician, founder of Orbital
• Phil Hartnoll (born 1965), British musician, founder of Orbital
• Phyllis Hartnoll (1906–1997), British poet, author and editor
• William Hartnoll (1841–1932), Australian politician