Genetically, the Daurs are descendants of the Khitan, as recent DNA analyses have proven.
In the Qianlong Emperor's "钦定《辽金元三史语解》" (Imperially commissioned Translations of the History of Liao, History of Jin and History of Yuan) he retranslates "大贺", a Khitan clan described in the History of Liao, as "达呼尔".
That is the earliest theory that claims Daurs are descendants of Khitans.

In the 17th century, some or all of the Daurs lived along the Shilka, upper Amur, on the Zeya and Bureya River.
They thus gave their name to the region of Dauria, also called Transbaikal, now the area of Russia east of Lake Baikal.

By the mid-17th century, the Amur Daurs fell under the influence of the Manchus of the Qing Dynasty which crushed the resistance of Bombogor, leader of the Evenk-Daur Federation in 1640.
When the Russian explorers and raiders arrived to the region in the early 1650 (notably, during Yerofei Khabarov's 1651 raid), they would often see the Daur farmers burn their smaller villages and taking refuge in larger towns.
When told by the Russians to submit to the rule of the Tsar and to pay yasak (tribute), the Daurs would often refuse, saying that they already paid tribute to the Shunzhi Emperor (whose name the Russians recorded from the Daurs as Shamshakan).
The Cossacks would then attack, usually being able to take Daur towns with only small losses.
For example, Khabarov reported that in 1651 he had only 4 of his Cossacks killed while storming the town of the Daur prince Guigudar (Гуйгударов городок) (another 45 Cossacks were wounded, but all were able to recover).
Meanwhile, the Cossacks reported killing  661 "Daurs big and small" at that town (of which, 427 during the storm itself),  and taking 243 women and 118 children prisoners, as well as capturing 237 horse and 113 cattle.
The captured Daur town of Yaxa became the Russian town Albazin, which was not recaptured by the Qing until the 1680s.

Facing the Russian expansion in the Amur region, between 1654 and 1656, during the reign of Shunzhi Emperor, the Daurs were forced to move southward and settle on the banks of the Nen River, from where they were constantly conscripted to serve in the banner system of the Qing emperors.

When the Japanese invaded the area of present-day Morin Dawa in Inner Mongolia in 1931, the Daurs carried out an intense resistance against them.

Konan Naito pointed out that Takri Kingdom where King Dongmyeong, a founder of Buyeo was born, as a country of Daur people who lived by Songhua River.
Genetically, the Daurs are descendants of the Khitan, as recent DNA analyses have proven. In the Qianlong Emperor's "钦定《辽金元三史语解》" (Imperially commissioned Translations of the History of Liao, History of Jin and History of Yuan) he retranslates "大贺", a Khitan clan described in the History of Liao, as "达呼尔". That is the earliest theory that claims Daurs are descendants of Khitans.
In the 17th century, some or all of the Daurs lived along the Shilka, upper Amur, on the Zeya and Bureya River. They thus gave their name to the region of Dauria, also called Transbaikal, now the area of Russia east of Lake Baikal.
By the mid-17th century, the Amur Daurs fell under the influence of the Manchus of the Qing Dynasty which crushed the resistance of Bombogor, leader of the Evenk-Daur Federation in 1640. When the Russian explorers and raiders arrived to the region in the early 1650 (notably, during Yerofei Khabarov's 1651 raid), they would often see the Daur farmers burn their smaller villages and taking refuge in larger towns. When told by the Russians to submit to the rule of the Tsar and to pay yasak (tribute), the Daurs would often refuse, saying that they already paid tribute to the Shunzhi Emperor (whose name the Russians recorded from the Daurs as Shamshakan). The Cossacks would then attack, usually being able to take Daur towns with only small losses. For example, Khabarov reported that in 1651 he had only 4 of his Cossacks killed while storming the town of the Daur prince Guigudar (Гуйгударов городок) (another 45 Cossacks were wounded, but all were able to recover). Meanwhile, the Cossacks reported killing  661 "Daurs big and small" at that town (of which, 427 during the storm itself),  and taking 243 women and 118 children prisoners, as well as capturing 237 horse and 113 cattle. The captured Daur town of Yaxa became the Russian town Albazin, which was not recaptured by the Qing until the 1680s.
Facing the Russian expansion in the Amur region, between 1654 and 1656, during the reign of Shunzhi Emperor, the Daurs were forced to move southward and settle on the banks of the Nen River, from where they were constantly conscripted to serve in the banner system of the Qing emperors.
When the Japanese invaded the area of present-day Morin Dawa in Inner Mongolia in 1931, the Daurs carried out an intense resistance against them.
Konan Naito pointed out that Takri Kingdom where King Dongmyeong, a founder of Buyeo was born, as a country of Daur people who lived by Songhua River.
Daur people