Family name モーサ (モーサ 
, Mouser 
) , all over the world, is quite a rare cognomen. The family name モーサ is habitual in Mauritius, where it is quite a rare surname, the United States, where it is a rare surname, and New Zealand. Measured by absolute frequency, it most frequently occurs in the United States, the United Kingdom, and Australia. Much less frequently, モーサ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| モーサ | Japan |
| Mouser | Australia, Canada, United Kingdom, United States, Indonesia |