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Cognomen Tõnis (Antonius , Tonis , Tõnis ) , throughout the world, is a common family name. The surname Tõnis is habitual in Suriname, where it is quite a common surname, Namibia, and Indonesia, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Indonesia, Namibia, and Malaysia. More prevalently, Tõnis is the forename as well as the last name.
Aal, Väli, Ustal, Kallas, Kasemägi, Kipper, Kiisküla, Tapupere, Tuulik, Tüür, Elling, Ivanov, Metstak, Segerkrantz, Allmäe, Rüütel, Lipstok, Teemets, Tõniste, Nõmmik, Vahesaar, Veinberg, Venek, Nerep, Peljo, Kuusk, Oja, Mäe, Savi, Saar, Arro, Kald, Kase, Kask, Rabi, Room, Sandermat, Laks, Link, Luik, Lukk, Luts, Tamm, Tali, Nurk, Valk, Vare, Mägi, Lepp, and Tõnisson