Family name Markao (Markao 
) , throughout the world, is a very rare cognomen. The last name Markao is characteristic of Thailand, where it is a very rare surname, the United States, where it is an extremely rare surname, and Brazil. Very seldom, Markao is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Markao | India, United States, Brazil, Thailand |