Family name Dashdavaa (Dashdavaa 
) , around the world, is a rare last name. The family name Dashdavaa is habitual in Mongolia, where it is quite a common surname, the United States, where it is an extremely rare surname, and Canada. Not in comparison with a country's population, it is the most numerous in Mongolia, the United States, and China. Very seldom, Dashdavaa is the forename as well as the last name.