All around the world, 洞 (Uro 
, 洞 
) is quite a common unisex given name. The first name 洞 is characteristic of Slovenia, where it is a rare boy's name, India, where it is a rare largely female, but infrequently masculine name, and Nigeria, where it is a rare epicene name. Measured by absolute frequency, it is the most numerous in India, China, and Nigeria. Also, 洞 is the last name as well as the forename.