Cognomen Hyakuya (Hyakuya 
) , in the entire world, is a very rare family name. The family name Hyakuya is habitual in Indonesia, where it is a very rare surname, Germany, where it is an extremely rare surname, and Mexico. Also, Hyakuya is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hyakuya | Germany, Mexico, Philippines, Indonesia |