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Globally, Olka (Olka , Олька ) is quite a rare feminine first name. The first name Olka is habitual in Eastern Europe, particularly Moldova, where it is quite a common feminine name, Belarus, and Poland, where it is quite a rare female name. Measured by absolute frequency, it is the most numerous in Eastern Europe, particularly Russia, Belarus, and Poland. Also, Olka is the last name as well as the forename.
Olka is also a name for the fictitious and mythical characters: Olga Gurlukovich , the character in Metal Gear; Olga Mesmer ; Olga Barcowa ; Olga Ivanovna Dymovа , the fictional character from Anton Chekhov's The Grasshopper and Olga , the operatic character in the opera Eugene Onegin by Pyotr Ilyich Tchaikovsky; Tatyana's sister, among other works.