About Mongkut

Mongkut was the fourth monarch of Siam (Thailand) under the House of Chakri, titled Rama IV. He ruled from 1851 to 1868. His full title in Thai is Phra Bat Somdet Phra Menthora Ramathibodi Sri Sinthara Mahamakut Phra Mongkut Phra Siam Deva Mahamakut Wittaya Maharaj.
Mongkut was the fourth monarch of Siam (Thailand) under the House of Chakri, titled Rama IV. He ruled from 1851 to 1868. In 1809, Prince Isarasundhorn was crowned as Buddha Loetla Nabhalai (later styled King Rama II.) In 1824, Mongkut became a Buddhist monk (ordination name Vajirayan; Pali Vajirañāṇo), following a Siamese tradition that men aged 20 should become monks for a time. In 1835 he began a reform movement reinforcing the vinaya law that evolved into the Dhammayuttika Nikaya, or Thammayut sect.

The Dharma transmission – Founders & patriarchs of Buddhist currents

A lineage in Buddhism is a line of transmission of the Buddhist teaching that is "theoretically traced back to the Buddha himself." The acknowledgement of the transmission can be oral, or certified in documents. Several branches of Buddhism, including Chan (including Zen and Seon) and Tibetan Buddhism maintain records of their historical teachers. These records serve as a validation for the living exponents of the tradition. In Chan and Zen Buddhism, transmission is a custom .