In all the world, 海内 (Hainer 
, 海内 
) is a rare dominantly male, but uncommonly female given name. The given name 海内 is characteristic of Costa Rica, where it is a rare male name, Germany, and Colombia, where it is a very rare masculine name. In absolute terms, it most frequently occurs in Germany, Colombia, and China. More frequently, 海内 is the last name as well as the forename.