Maha Thammaracha IV (Thai: มหาธรรมราชาที่ ๔, pronounced [mā.hǎːtʰām.mā.rāː.t͡ɕʰāːtʰîːsìː]), born as Borommapan (Thai: บรมปาล, pronounced [bɔ̄ː.rōm.mā.pāːn]), was the last king of the Sukhothai Kingdom.

In 1419, after the death of Sai Lue Thai, his sons Phaya Ram and Phaya Ban Mueang fought for the throne. Intharacha of Ayutthaya Kingdom intervened and further divided the kingdom between the two. Ban Mueang was installed as a vassal king, owing allegiance to Ayutthaya. His residence was in Phitsanulok, though the kingdom was still referred to as "Sukhothai". In 1430, he moved his residence back to the old capital. When Maha Thammaracha IV died in 1438, King Borommaracha II of Ayutthaya installed his son Ramesuan (the future king Borommatrailokkanat of Ayutthaya) as viceroy of Sukhothai, thus marking the end of Sukhothai as a separate kingdom.

Ancestry

Ancestors of Maha Thammaracha IV
16. King Loe Thai of Sukhothai8. King Maha Thammaracha I of Sukhothai4. King Maha Thammaracha II of Sukhothai9. Si Thammaratchamada2. King Maha Thammaracha III of Sukhothai20. King Loe Thai of Sukhothai10. King Maha Thammaracha I of Sukhothai5. Saṃtec Braḥ Rājadebī Srī11. Si Thammaratchamada1. King Maha Thammaracha IV of Sukhothai3. Sakha
16. King Loe Thai of Sukhothai
8. King Maha Thammaracha I of Sukhothai
4. King Maha Thammaracha II of Sukhothai
9. Si Thammaratchamada
2. King Maha Thammaracha III of Sukhothai
20. King Loe Thai of Sukhothai
10. King Maha Thammaracha I of Sukhothai
5. Saṃtec Braḥ Rājadebī Srī
11. Si Thammaratchamada
1. King Maha Thammaracha IV of Sukhothai
3. Sakha
Regnal titles
Maha Thammaracha IVPhra Ruang DynastyBorn: ?Died: 1438
Preceded byMaha Thammaracha IIIKing of Sukhothai 1419–1438Succeeded byRamesuan