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All over the world, Costar (Kosto , Costar , Custo ) is quite a rare unisex forename. The given name Costar is characteristic of Western Asia, particularly Oman, where it is quite a rare dominantly masculine, but seldom female name, Qatar, where it is quite a rare male name, and Bahrain. Not in comparison with a country's population, it most frequently occurs in Bangladesh, Saudi Arabia, and Oman. Likewise, Costar is the last name as well as the forename.