Surname Jazenko (Jazenko 
, Язенко 
) , globally, is a rare last name. The family name Jazenko is habitual in Kazakhstan, where it is a rare surname, Russia, where it is a very rare surname, and Kyrgyzstan. Measured by absolute frequency, it is the most numerous in Russia, Germany, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Jazenko | Brazil, Germany, Canada |
| Язенко | Kazakhstan, Russia, Ukraine, Kyrgyzstan |