I assume you mean a resident of the Mekong Delta in Vietnam........in which case, the answer would be "a Vietnamese person".
lao
Lao
Lao
If you are looking for a crossword answer to today's question "mekong native" I'm pretty sure the answer is LAO. Wiki has a page on them: http://en.wikipedia.org/wiki/Lao_people
This species is native to the Mekong basin of Laos, Cambodia, Vietnam and Thailand.
A Mekong food chain is a food chain of the Mekong region
Mekong River is in China
Mekong Auto was created in 1991.
Mekong Airlines ended in 2003.
The population of Mekong Capital is 40.
Mekong Capital was created in 2001.
Mekong Wagtail was created in 2001.
Air Mekong was created in 2009.