Cognomen Тьатьяна (Tatiana 
, Tatyana 
, Тьатьяна 
) , throughout the world, is a common surname. The last name Тьатьяна is habitual in Georgia, where it is a common surname, Moldova, and Israel (explore the name in all countries). In absolute terms, this name is the most popular in Israel, Colombia, and Poland. More frequently, Тьатьяна is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tatiana | Moldova, Colombia, United States, Brazil, Democratic Republic of the Congo |
| Tatyana | Moldova, Colombia, United States, Cameroon, Brazil |
| Тьатьяна | Russia |