Surname Sumanis (Sumanis 
) , all around the world, is a very rare cognomen. The family name Sumanis is characteristic of Latvia, where it is quite a rare surname, Australia, where it is a very rare surname, and Canada, where it is an extremely rare surname. In absolute terms, it is the most numerous in Latvia, the United States, and Australia. Very seldom, Sumanis is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sumanis | Australia, Canada, United States, India, Latvia |