Cognomen Seymon (Seymon 
) , all around the world, is a very rare last name. The family name Seymon is habitual in Australia, where it is a rare surname, Nicaragua, where it is a very rare surname, and Honduras. Measured by absolute frequency, it most frequently occurs in Australia, the United States, and France. Likewise, Seymon is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Seymon | Australia, Romania, Spain, Brazil, United States |