Cognomen Tammaru (Tammaru 
) , all over the world, is a rare family name. The cognomen Tammaru is habitual in Northern Europe, particularly Estonia, where it is quite a common surname, Finland, where it is a rare surname, and Sweden. Measured by absolute frequency, it most frequently occurs in Estonia, the United States, and Sweden.
| VARIANT | COUNTRY |
|---|---|
| Tammaru | Sweden, Estonia, Finland, United States, India |
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philip tammaru (b. 1909) |
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toomas tammaru Estonian entomologist, EE (b. 1968) |
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tiit tammaru Estonian geographer, EE (b. 1972) |
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| kalju tammaru (b. 1956) |
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| karin tammaru Estonian actress, EE (b. 1971) |
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| margus tammaru Estonian athletics competitor, EE |
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Mr, Tõnu, Nikki, Ellen, Emily, Virge, Virko, Uno-Hendrik, Marika, Markus, Mihkel, Sandra, Andrus, Katrin, Kaspar, Kaarel, Toomas, Evelyn, Hedvig, Valene, Villem, Indrek, Timur, Triin, Taavi, Tauri, Ms, Age, Enn, Ivo, Uku, Mati, Anna, Karl, Kadi, Tiit, Merilyn, Elis, Olaf, Marko, Andre, Carol, Karin, Kalju, Lemmi, Janne, Tarmo, Taivo, Erik, and Sirelin