Last name Ryuhei (Ryuhei 
) , all around the world, is a rare cognomen. The family name Ryuhei is characteristic of Japan, where it is a very rare surname, Germany, where it is an extremely rare surname, and Chile. In absolute terms, it is the most numerous in China, Japan, and Germany. Also, Ryuhei is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ryuhei | Germany, Singapore, United States, Japan, China |