Leonard Knyff or Leendert Knijff (10 August 1650, Haarlem - April 1722, London) was a Dutch draughtsman and painter. He was the son of landscape painter Wouter Knijff and the brother of Jacob Knijff and left around 1681 from Holland to England. Knyff collaborated with Kip to produce views of country houses and gardens for Britannia Illustrata and Le Nouveau Théâtre. In the later 20th century many of the Kip and Knyff views were hand-coloured, as monochrome landscapes proved increasingly harder to sell in the market.