Last name Seillon (Selion 
, Seillon 
) , in all the world, is a very rare cognomen. The last name Seillon is habitual in France, where it is a rare surname, Brazil, where it is an extremely rare surname, and Philippines. Much less frequently, Seillon is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Selion | United States, Philippines, Brazil |
| Seillon | United States, France, Brazil |
| jean de seillon (b. 1850) |
|