* "Russian land" is not a precise term. The Russian Empire, the Soviet Union, and modern Russia have all had varying territories over time.
* Many countries have been established on land that was once part of the Russian Empire. This includes the Baltic states (Estonia, Latvia, Lithuania), Finland, Poland, Ukraine, Belarus, Moldova, Georgia, Armenia, Azerbaijan, Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, Uzbekistan, and more.
Therefore, to answer your question accurately, we need to be more specific about which period of "Russian land" you're referring to.
For example:
* If you mean the Russian Empire, then countries like Finland and the Baltic states were not established on formerly Russian land, as they were independent before being absorbed by Russia.
* If you mean the Soviet Union, then many of the above-mentioned countries, including Ukraine, Belarus, and the Central Asian republics, were not established on formerly Russian land, as they were incorporated into the Soviet Union after the Russian Revolution.
Could you please clarify which period you are interested in? This will help me give you a more accurate answer.