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Last name Rybalko (Rybalko , Рыбалко , Рибалко ) , in all the world, is a common family name. The cognomen Rybalko is habitual in Ukraine, where it is quite a common surname, Belarus, and Kazakhstan. Measured by absolute frequency, this name is the most popular in Russia, Ukraine, and Kazakhstan. Very seldom, Rybalko is the forename as well as the last name.