The Khmer are the people who built the powerful Khmer Kingdom in Cambodia in 800 AD. to last for over 600 years. We can see the great Khmer monuments in Cambodia and in North - East Thailand. to learn more about the Khmer people and their kingdom read my book "Along The Maekhong River and The Cambodian Border The Khmer people make up about 90 percent of the population of Cambodia. Many Khmer al..