Cognomen Sirelius (Sirelius 
) , in all the world, is a rare last name. The family name Sirelius is characteristic of Northern Europe, particularly Finland, where it is quite a rare surname, and Sweden, where it is a rare surname.
| VARIANT | COUNTRY |
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| Sirelius | Finland, Sweden |
| k. j. g. sirelius Finnish priest (1818-1888), FI (b. 1818) |
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uuno sirelius Finnish ethnologist, FI (b. 1872) |
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| knut samuel sirelius Finnish physician (1827-1869) (b. 1827) |
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| otto arvid ferdinand sirelius FI (b. 1818) |
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lauri sirelius Finnish film actor and singer (1895-1931), FI (b. 1895) |
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| ian sirelius association football player, SE (b. 1987) |
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