Frederick Ranjan Manilal de Silva Gunatilleke (born 15 August 1951 in Colombo), or Ranjan Gunatilleke, is a former Sri Lankan cricketer who played one One Day International (ODI) in the 1979 Cricket World Cup. In September 2018, he was one of 49 former Sri Lankan cricketers felicitated by Sri Lanka Cricket, to honour them for their services before Sri Lanka became a full member of the International Cricket Council (ICC).