Ngoenyang in the context of "Lan Na"

Mass migration of Tai peoples from China (Guangxi) to Mainland Southeast Asia and Northern Thailand occurred between the 8th-10th century. The Mainland region was ruled by the Khmer Empire since 800 CE. The Thai established their own kingdoms: the semi-legendary Singhanavati Kingdom (691 BCE–638 CE) evolved into the Ngoenyang Kingdom (638–1292). In 1220, the Khmer controlled Sukhothai was conquered by the Thais and made the capital of the Sukhothai Kingdom. By 1220, the long declining Khmer Empire was mostly overrun by Thais. By the 13th century, the Sukhothai Kingdom (1238–1438) had replaced the Mon kingdoms in Central Thailand. During the reign of King Ramkhamhaeng the Thai script was created in 1283, the arts flourished, Thai institutions were developed, and people called themselves "Thai" as freed people from foreign rule.

In 1351, the Suphannabhum city-state (modern-day Suphan Buri), and Lavo city-state (modern-day Lop Buri) merged into the Ayutthaya Kingdom which was founded near the Chao Phraya River. Duarte Fernandes was the first European to arrive in Ayutthaya in 1511. Siam became the popular international name for Thailand.

Northern Thailand the oldest region in Thailand the main ethnic group Tai-Lue established their own kingdoms: the semi-legendary Singhanavati Kingdom (691 BCE–638 CE) evolved into the Ngoenyang Kingdom (638–1292). In 1220, the Khmer controlled Sukhothai was conquered by the Thais and made the capital of the Sukhothai Kingdom. By 1220, the long declining Khmer Empire was mostly overrun by Thais. By the 13th century, the Sukhothai Kingdom (1238–1438) had replaced the Mon kingdoms in Central Thailand. During the reign of King Ramkhamhaeng the Thai script was created in 1283, the arts flourished, Thai institutions were developed, and people called themselves "Thai" as freed people from foreign rule.

In 1351, the Suphannabhum city-state (modern-day Suphan Buri), and Lavo city-state (modern-day Lop Buri) merged into the Ayutthaya Kingdom (Tai-Lue from the Northern+Monic from Chao Phra Ya river basin = Siamese Kingdom) which was founded near the Chao Phraya River. Duarte Fernandes was the first European to arrive in Ayutthaya in 1511.

Yonok Nakhon Chaiburi Ratchathani Si Chang Saen (Northern Thai: ᩰᨿᨶᩫ᩠ᨠᨶᨣᩬᩁᨩᩱ᩠ᨿᨷᩩᩁᩦᩁᩣ᩠ᨩᨵᩣᨶᩦᩆᩕᩦᨩ᩶ᩣ᩠ᨦᩯᩈ᩠᩵ᨶ; Thai: โยนกนครไชยบุรีราชธานีศรีช้างแส่น) was a Tai semi-legendary kingdom based along the Kok River in the Chiang Rai Basin in northern Thailand, existed from 691 BCE to 638 CE. It was centered in Yonok Nahaphan (Chiang Saen District, Chiang Rai) and then moved to Wiang Prueksa (Fang District) after the old capital was submerged below Chiang Saen Lake due to an earthquake in 545.

Singhanati evolved into the Ngoenyang Kingdom in 638, which continued to the formation of Lan Na in 1292.