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Around the world, Tõnu (Tõnu , Тыну ) is a rare male forename. The first name Tõnu is habitual in Estonia, where it is quite a common masculine name, Sweden, where it is a rare male name, and Russia, where it is a very rare masculine name.
Aru, Pippar, Raadik, Rääk, Lember, Lehtla, Järve, Talpsep, Valdur, Metsäär, Raudsepp, Rohumägi, Tuppits, Naissoo, Eermann, Schasmin, Akmentin, Pullerits, Grünberg, Tammiksalu, Tammearu, Steinberg, Kastan, Särgava, Ilves, Tramm, Oja, Mets, Sein, Sepp, Kask, Kesa, Kukk, Park, Laur, Laak, Pomerants, Laas, Taal, Vaus, Viik, Ints, Mägi, Anton, Arrak, Kerge, Kõiv, Jää, Tamm, and Trubetsky