Family name Sideral (Sideral 
) , worldwide, is a very rare last name. The family name Sideral is characteristic of Spain, where it is a very rare surname, Colombia, and Venezuela, where it is an extremely rare surname. In absolute terms, it is the most numerous in Spain, Colombia, and Brazil. More frequently, Sideral is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sideral | Brazil, Colombia, Democratic Republic of the Congo, India, Spain |
| carlinhos sideral Brazilian musician (1931-2003), BR (b. 1931) |
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