>
Cognomen 平原 (平原 , Hirahara
, Хирахара) , in the entire world, is quite a rare surname. The surname 平原 is characteristic of China, where it is a rare surname, Singapore, and the United States, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in China, the United States, and Brazil. More prevalently, 平原 is the forename as well as the last name.