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Worldwide, Osęka (Osęka ) is an extremely rare unknown gender forename. Much more prevalently, Osęka is the last name as well as the forename.
Oseka, and Sęk
Ola, Maks, Marta, Karol, Paweł, Piotr, Laura, Julia, Marcin, Szymon, Janusz, Andrzej, Magdalena, and Bartłomiej