Kings of Siam and Thailand
The only country in Southeast Asia to remain independent during the colonial period, and until 1939 officially known as "Siam" (now Muang Tai, "Land of the Free," or Pratet Tai, "Free Kingdom"), Thailand has been strongly influenced by both China and India but is fundamentally a sub-Indian civilization, based on Buddhism and using a version of the Devanagari (Sanskrit) alphabet, adapted from Cambodian. A Buddhist historical Era is still used in Thailand.  
In fighting with Vietnam for influence over Cambodia and Laos the Vietnamese were not even regarded as properly Buddhist, because of the more Confucian basis of Vietnamese government. Nevertheless, Siam was more closely in contact with China than with India, has long been the home of a large Chinese community, and in 1575 even requested a new royal seal from China, to replace the one lost to the Burmese in 1569. So we really have a phenomenon of Indian and Chinese cultural spheres overlapping. It is noteworthy that both Laos and Cambodia were vassals of the original Bangkok kingdom but were lost to the French colonial empire in Vietnam.
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Courtesy of  Wikipedia
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Monarchs of Thailand
Sukhothai Kingdom

Sri Indraditya · Ban Muang · Ramkhamhaeng · Phraya Si Songklam · Lerthai · Nguanamthom · Lithai · Leuthai · Saileuthai · Borommapan

Ayutthaya Kingdom

Uthong · Ramesuan · Boromma Ratchathirat I · Thong Lan · Rama Ratchathirat · Intha Racha · Boromma Ratchathirat II · Trailokanat · Boromma Racha III · Ramathibodi II · Nor Phutthangkun · Ratsadathiratcha Kuman · Chairacha · Kaeo Fa · Vạravoṇśādhirāj · Maha Chakkraphat · Mahinthara Thirat · Maha Thammaracha · Naresuan · Ekathotsarot · Sri Saowaphak · Songtham · Jēṣṭhādhirāj · Ādiŧyavoṇś · Prasat Thong · Chai · Sri Suthammaracha · Narai · Phetracha · Suriyen Dara Thibodi · Sanphet IX · Boromakot · Uthumphon · Ekathat

Thonburi Kingdom
Rattanakosin Kingdom

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Related Topics: Thailand A to Z