Where does “kampuchea” come from?

Kampuchea derives from Khmer កម្ពុជា, which comes from Pali kamboja, an ancient term for the region and its people.

Ancestry of “kampuchea”, step by step

Step	Language	Word	Meaning
1	Khmer	កម្ពុជា	—
2	Pali	kamboja	—
3	Sanskrit	काम्बोज	born in or coming from Kamboja; a native of...
4	Hindi	कम्बोज	Kamboj