Cognomen Sirkka (Sigfrid 
, Sirkka 
, 西卡 
) , in the world, is quite a rare family name. The cognomen Sirkka is characteristic of Finland, where it is quite a rare surname, Namibia, and Sweden. Not in comparison with a country's population, it most frequently occurs in Finland, Tanzania, and Sweden. More frequently, Sirkka is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sigfrid | Germany, Sweden, Spain, United States, Tanzania |
| Sirkka | Germany, Sweden, Namibia, Spain, Finland |
| 西卡 | China |
| סירקה | Israel |
Heinäsirkka, Sigurd, and Sirkku
| impi sirkka Finnish translator, FI (b. 1884) |
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| karl-wilhelm sirkka Norwegian politician, NO (b. 1939) |
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mira donna sirkka Finnish Contemporary circus and Performance Artist and Director, FI (b. 1991) |
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| outi sirkka researcher |
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| jani sirkka researcher |
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| janne sirkka FI |
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| laura sirkka FI |
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