Family name Sergejs (Сергей 
, Сергій 
, Sergejs 
) , throughout the world, is a widespread surname. The cognomen Sergejs is habitual in Armenia, where it is a common surname, Kyrgyzstan, and Moldova (explore the name in all countries). Not in comparison with a country's population, it is commonest in Russia, Kyrgyzstan, and Belarus. Predominantly, Sergejs is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Сергей | Kazakhstan, Ukraine, Belarus, Russia, Azerbaijan |
| Сергій | Ukraine, Poland, United States, Israel, Russia |
| Sergejs | United Kingdom, Belarus, Latvia, Lithuania, Russia |
| Сергейс | Ukraine, Russia |
Serge, Sergei, Sergej, Sergejus, Sergey, Serghei, Sergi, Sergio, Sergios, Sergiu, Sergius, Sergiusz, Serguei, Sergueï, Serguéi, Serhii, Serhij, Serhiy, Serhiï, Serxio, Siarhei, Siarhej, Siarhiej, Siergiej, Srđan, Syarhey, Szergej, Sérgio, Σέργιος, Сергий, Сергиос, Сергиус, Сергиуш, Серджо, Серджу, Серж, Сержи, Сержио, Сержиу, Серхи, Серхий, Серхио, Серый, Серёга, Срджан, Сяргей, סרג'י, סרגיוס, סרגיי, سرجيوس, سيرج, سيرجى, سيرجي, سيرجيو, سيرغي, スルタン, セルゲイ, セルジョ, セルヒオ, and 塞登
Senko, Jefimovs, Nikitins, Novikovs, Fjodorovs, Mihailovs, Saveljevs, Semjonovs, Solovjovs, Stepanovs, Andrejevs, Bogdanovs, Kuznecovs, Lukjanskis, Jermakovs, Taimasovs, Trofimovs, Vasiljevs, Aleksejevs, Terentjevs, Trimailovs, Timofejevs, Danilovs, Nikolajevs, Romanovs, Bramanis, Kohovs, Popovs, Orlovs, Karpovs, Kairans, Kukjans, Pavlovs, Petrovs, Gracovs, Leonovs, Livmanis, Volkovs, Vohrins, Frolovs, Ivanovs, Makarovs, Mihejevs, Sorokins, Smirnovs, Antonovs, Cvetkovs, Kovalovs, and Urbanovics