Family name Seynour (Seynour 
) , around the world, is an extremely rare last name. The cognomen Seynour is habitual in Northern America, particularly Canada, where it is an extremely rare surname, and the United States. Likewise, Seynour is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Seynour | Canada, Spain, United States |