Last name Khammao (Khammao 
) , all around the world, is a very rare family name. The last name Khammao is characteristic of Thailand, where it is a very rare surname, the United States, where it is an extremely rare surname, and Canada. Very seldom, Khammao is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khammao | France, United States, Canada, Thailand |
| khammao vilai Laotian politician (1892-1965), LA (b. 1892) |
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| phaya khammao Lao politician (1911-1984), LA (b. 1911) |
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| tiao khammao (b. 1911) |
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