Family name Kaljo (Кальо 
, Kaljo 
) , around the globe, is a rare last name. The surname Kaljo is habitual in Estonia, where it is quite a common surname, Bulgaria, where it is a rare surname, and Finland. Measured by absolute frequency, it most frequently occurs in Estonia, Bulgaria, and Sweden. Likewise, Kaljo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Кальо | Russia, Bulgaria |
| Kaljo | Sweden, Finland, Austria, Malaysia, Estonia |
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kaljo raag Estonian weightlifter, EE (b. 1892) |
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kaljo kiisk Estonian film director, EE (b. 1925) |
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kaljo palmiste Estonian mountaineer, EE (b. 1948) |
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| caesar kaljo (b. 1897) |
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| julius kaljo Estonian association football player (1910-1954), EE (b. 1910) |
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| kaljo raid Estonian composer, EE (b. 1921) |
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| kaljo põhjakas Estonian agronomist, EE (b. 1923) |
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| richard kaljo RU (b. 1914) |
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| kaljo käärik (b. 1917) |
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| dimitri kaljo Estonian geologist, EE (b. 1928) |
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| kaljo polli Estonian painter, EE (b. 1928) |
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| kaljo villako (b. 1919) |
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| kaljo pork Estonian botanist (1930-1981), EE (b. 1930) |
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| kaljo rägo (b. 1921) |
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| aldur kaljo Estonian diplomat, EE (b. 1931) |
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Mr, Bajram, Regina, Didrik, Julius, Toomas, Helena, Fevzudin, Indira, Andres, Zirfet, Sadetin, Andreas, Crister, Paulina, Richard, Dimitri, Sakarias, Kristina, Muzafer, Meelis, Egils, Edina, Ms, Kai, Eda, Enn, Mike, Seit, Alar, Popp, Raif, Liis, Hans, Ivar, Romet, Gunta, Gvido, Liisi, Johan, Terry, Elvis, Nikodemus, and Christopher