What does Cambodia mean?

I found on the internet, Cambodia means as below:

Cambodia is a Southeast Asian nation whose landscape spans low-lying plains, the Mekong Delta, mountains and Gulf of Thailand coastline. Phnom Penh, its capital, is home to the art deco Central Market, glittering Royal Palace and the National Museum’s historical and archaeological exhibits. In the country’s northwest are the ruins of Angkor Wat, a massive stone temple complex built during the Khmer Empire.

Cambodia, officially known as the Kingdom of Cambodia and once known as the Khmer Empire, is a country located in the southern portion of the Indochina Peninsula in Southeast Asia. Its total landmass is 181,035 square kilometres, bordered by Thailand to the northwest, Laos to the northeast, Vietnam to the east and the Gulf of Thailand to the southwest. With a population of over 14.8 million, Cambodia is the 70th most populous country in the world. The official religion is Theravada Buddhism, which is practiced by approximately 95% of the Cambodian population. The country’s minority groups include Vietnamese, Chinese, Chams and 30 hill tribes. The capital and largest city is Phnom Penh, the political, economic, and cultural center of Cambodia. The kingdom is a constitutional monarchy with Norodom Sihamoni, a monarch chosen by the Royal Throne Council, as head of state. The head of government is Hun Sen, who is currently the longest serving leader in South East Asia and has ruled Cambodia for over 25 years. Cambodia’s ancient name is “Kambuja”. In 802 AD, Jayavarman II declared himself king marking the beginning of the Khmer Empire which flourished for over 600 years allowing successive kings to dominate much of Southeast Asia and accumulate immense power and wealth. The Indianized kingdom built monumental temples such as Angkor Wat and facilitated the spread of first Hinduism, then Buddhism to much of Southeast Asia. After the fall of Angkor to Ayutthaya in the 15th century, Cambodia was ruled as a vassal between its neighbors until it was colonized by the French in the mid-19th century. Cambodia gained independence in 1953.

Sources:
https://www.definitions.net/definition/cambodia
https://en.wikipedia.org/wiki/Cambodia