Family name Xenofontov (Ксенофонтов 
, Xenofontov 
) , across the world, is quite a common last name. The last name Xenofontov is habitual in Russia, where it is quite a rare surname, Luxembourg, and Belarus. Measured by absolute frequency, it is commonest in Russia, Ukraine, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Ксенофонтов | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Xenofontov | Russia, Luxembourg |
Ksenofontov, Ксенофонтов, Александр Сергеевич, and Хенофонтов