In all the world, Rill (Rill 
, 里尔 
, ลำธาร) is a rare epicene first name. The first name Rill is characteristic of Philippines, where it is a very rare largely boy's, but uncommonly girly name, Indonesia, where it is a very rare masculine name, and China, where it is a very rare epicene name. In absolute terms, the name is most common in China, Indonesia, and the United States. More prevalently, Rill is the last name as well as the forename.