All around the world, Rusby (Rusby 
) is a rare epicene first name. The first name Rusby is characteristic of Colombia, where it is a very rare feminine name, Peru, where it is a very rare predominantly girly, but very infrequently male name, and Philippines, where it is a very rare unisex name. Measured by absolute frequency, it is commonest in Philippines, Mexico, and Colombia. Likewise, Rusby is the last name as well as the forename.