Surname Trotskaja (Троцкая 
, Trotskaja 
) , across the world, is quite a rare last name. The cognomen Trotskaja is characteristic of Belarus, where it is quite a rare surname, Estonia, where it is a rare surname, and Kazakhstan. Measured by absolute frequency, this name is the most popular in Russia, Belarus, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Троцкая | Kyrgyzstan, Russia, Belarus, Kazakhstan, Ukraine |
| Trotskaja | Belarus, Estonia |