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Cognomen Ryza (Риза
, Ries
, Ryza
) , around the globe, is a common family name. The surname Ryza is characteristic of Western Europe, particularly Luxembourg, where it is quite a common surname, Germany, and Switzerland, where it is quite a rare surname. Measured by absolute frequency, it is commonest in Germany, the United States, and Indonesia. Very seldom, Ryza is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Риза | Ukraine, Kazakhstan, Russia, Bulgaria, Azerbaijan |
| Ries | United States, France, Indonesia, Germany, Brazil |
| Ryza | United States, Czechia, Indonesia, Philippines, Canada |
| Рыза | Russia, Kyrgyzstan, Kazakhstan |