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Family name Troitskaja (Троицкая , Troitskaja , Троитская ) , all around the world, is quite a common surname. The cognomen Troitskaja is habitual in Russia, where it is quite a rare surname, Kazakhstan, and Belarus, where it is a rare surname.
VARIANT | COUNTRY |
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Троицкая | Kazakhstan, Ukraine, Belarus, Kyrgyzstan, Russia |
Troitskaja | Germany, Estonia |
Троитская | Russia |