Cognomen Сиома (Sioma 
, Сиома 
) , around the globe, is a rare surname. The cognomen Сиома is habitual in Poland, where it is a rare surname, Kenya, and Georgia. Measured by absolute frequency, it is the most numerous in Poland, Kenya, and the United States. Likewise, Сиома is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sioma | Kenya, Poland, Brazil, United States, Guatemala |
| Сиома | Russia |