Nan Suwan was a northern Thai Church elder and war slave from Chiang Mai. He and his family moved to Chiang Saen where he was instrumental in expanding the church in northern Thailand as well as into the neighboring countries of Laos, Burma and Yunnan, China.
Daniel Beech Bradley is perhaps Thailand's most famous missionary due to his work in modernizing Thailand through his medical and printing press work in Bangkok.
On July 8, 1878, Edna S. Cole was assigned to serve in Siam by the Presbyterian Board of Foreign Missions. She would serve in Siam until retiring as a missionary in 1923.