Cognomen Sénior (Sénior 
) , around the globe, is a very rare last name. The cognomen Sénior is characteristic of Portugal, where it is a rare surname, and France, where it is a very rare surname. More frequently, Sénior is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sénior | Morocco, France, Democratic Republic of the Congo, Portugal |
| alain sénior French rabbi, FR (b. 1958) |
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| félix josé da costa sénior PT |
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