All over the world, Casin (Casin 
) is a very rare unisex first name. The given name Casin is habitual in Romania, where it is a rare female name, Nigeria, where it is an extremely rare male name, and the United States, where it is an extremely rare primarily male, but scarcely feminine name. Not in comparison with a country's population, it most frequently occurs in Romania, India, and the United States. More prevalently, Casin is the last name as well as the forename.