Family name Sīmanis (Sīmanis 
) , all over the world, is a very rare surname. The surname Sīmanis is habitual in Northern Europe, particularly Latvia, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sīmanis | Latvia |
| andrejs sīmanis Latvian politician and lawyer (1865-1926), LV (b. 1865) |
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| sīmanis berģis Latvian writer, LV (b. 1887) |
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| ādolfs sīmanis Latvian footballer (1909-1979), LV (b. 1909) |
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| dāvis sīmanis Latvian screenwriter (1942-2007), LV (b. 1942) |
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| haralds sīmanis Latvian musician, LV (b. 1951) |
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| dāvis sīmanis Latvian screenwriter, LV (b. 1980) |
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