Surname Orsoo (Orsoo 
) , in the world, is a rare last name. The family name Orsoo is habitual in Mongolia, where it is quite a common surname, Nigeria, where it is a very rare surname, and Germany, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Mongolia, Nigeria, and India. Much less frequently, Orsoo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Orsoo | Germany, Nigeria, United States, India, Mongolia |