Surname Klitschko (Klitschko 
, Клічко 
, Кличко 
) , worldwide, is a rare family name. The surname Klitschko is habitual in Ukraine, where it is a rare surname, Switzerland, where it is a very rare surname, and Russia. Measured by absolute frequency, it is the most numerous in Ukraine, Russia, and Germany.
| VARIANT | COUNTRY |
|---|---|
| Klitschko | Germany, Switzerland, France |
| Клічко | Ukraine |
| Кличко | Ukraine, Russia, Kazakhstan |
| קליצ'קו | Israel |
| natalia klitschko DE (b. 1974) |
|