Last name タチアナ (Тетяна 
, Tatiana 
, Tatjana 
, and others...) , all over the world, is a common cognomen. The surname タチアナ is habitual in North Macedonia, where it is a common surname, Georgia, and Moldova (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in Israel, Colombia, and Poland. Much more prevalently, タチアナ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Тетяна | Poland, Israel, Kyrgyzstan, Russia, Ukraine |
| Tatiana | Brazil, Moldova, Serbia, Colombia, United States |
| Tatjana | Brazil, Serbia, Colombia, United States, Germany |
| Tatyana | Brazil, Moldova, Colombia, United States, Germany |
| Tetyana | Brazil, Argentina, United States, Germany, Italy |
| Tetiana | Brazil, Colombia, United States, Germany, Italy |
| タチアナ | Japan |
Tacciana, Tachiana, Taciana, Tania, Tanja, Tanya, Tanía, Tat'Jana, Tathiana, Tatjána, Tatsiana, Tatsjana, Tatyjana, Tayanna, Taťjana, Taťána, Tetjana, Teťana, Tia, Tânia, Tétiana, Τάνια, Τατιάνα, Танечка, Танька, Танюха, Танюша, Танюшечка, Таня, Татьяна, Татьяна Татьяна, Татяна, Татјана, Таццяна, Тацяна, Тања, Тиа, טטיאנה, טניה, تاتيانا, تانيا, تانیا, তানিয়া, タタナ, タニヤ, 塔尼亚, 塔尼娅, 汤贾, and 蒂亚