The name Tatiana has its origins in ancient Rome, derived from the Roman family name Tatius. It is believed to have been a Sabine praenomen or personal name used by the Sabines, an Italic tribe that inhabited the central Apennine regions of ancient Italy. The name is thought to be derived from the Latin root "tata," meaning "father" or "daddy," suggesting a paternal or familial connotation.

One of the earliest known references to the name Tatiana can be found in the historical accounts of the Roman historian Livy, who mentioned a Sabine leader named Titus Tatius in his work "Ab Urbe Condita." Titus Tatius was said to have co-ruled Rome alongside Romulus after the famous incident of the Rape of the Sabine Women.

The name gained widespread popularity in the Christian tradition after the 3rd century martyrdom of Saint Tatiana, a Roman deaconess who was tortured and executed for her faith during the reign of Emperor Severus Alexander. Her feast day is celebrated on January 12th in the Eastern Orthodox and Roman Catholic churches.

Throughout history, there have been several notable individuals bearing the name Tatiana. One of the earliest was Tatiana Baccari (fl. 1590s), an Italian painter and printmaker active in Florence during the late Renaissance period. Another was Tatiana Prozorovskaya (1691-1767), a Russian noblewoman and courtier who served as a lady-in-waiting to Empress Elizabeth Petrovna.

In the 19th century, Tatiana Shchepkina-Kupernik (1874-1952) was a prominent Russian actress and theatre director, known for her performances in plays by Chekhov and Gorky. During the same period, Tatiana Alexeyevna Romanova (1897-1918) was the second daughter of Tsar Nicholas II, the last Russian emperor, who was executed along with her family during the Bolshevik Revolution.

More recently, Tatiana Nikolayevna Yablonskaya (1917-2005) was a celebrated Soviet and Russian painter, best known for her portraits and genre scenes depicting everyday life in the Soviet Union.

These are just a few examples of the many notable individuals throughout history who have borne the name Tatiana, a name that has endured for centuries and continues to be widely used across various cultures and regions.