Noi Acharayangkun (Thai: น้อย อาจารยางกูร, 5 July 1822 – 16 October 1891), known by the noble title Phraya Sisunthonwohan (พระยาศรีสุนทรโวหาร), was a Thai writer and scholar. He is best known for writing the first modern textbooks on the Thai language, the Munlabot Banphakit  series. Source: Wikipedia (en)