Siripun Taechachiadawong (born 1966) is a Thai writer who writes under the pen name Koynuch.Her works include the children's book, The Little Garuda, which won honorable mention for children's books in the 2002 Nai Indra Awards. She also wrote the novel, Mah Nakorn, which was adapted into the 2004 film, Citizen Dog, by her husband, Wisit Sasanatieng. Siripun also wrote the novelization of her husband's first film, Fah Talai Jone, or Tears of the Black Tiger.