Across the world, Олер (Oller 
, Ohler 
, Oler ) is a rare principally boy's, but scarcely female first name. The forename Олер is characteristic of Italy, where it is a very rare epicene name, China, where it is a very rare masculine name, and Philippines, where it is a very rare predominantly boy's, but scarcely feminine name. In absolute terms, it is commonest in China, the United States, and Italy. More frequently, Олер is the last name as well as the forename.