Family name Tajný (Tajný 
) , across the world, is a very rare cognomen. The family name Tajný is habitual in Eastern Europe, particularly Czechia, where it is a rare surname. Also, Tajný is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tajný | Czechia |
| janko tajný SK (b. 1855) |
|