Cognomen 勒哈 (Lehar 
, 勒哈) , in the entire world, is quite a rare last name. The cognomen 勒哈 is characteristic of Czechia, where it is quite a rare surname, Austria, where it is a rare surname, and Norway. In absolute terms, it is the most numerous in India, the United States, and Czechia. More frequently, 勒哈 is the forename as well as the last name.