Surname Seimys (Seimys 
) , in the world, is a very rare cognomen. The surname Seimys is characteristic of Lithuania, where it is quite a rare surname, Estonia, where it is a rare surname, and Venezuela, where it is an extremely rare surname. Much less frequently, Seimys is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Seimys | Brazil, Estonia, Lithuania, Venezuela |