Tatiana

is a female name of Sabine-Roman origin that became widespread in Eastern Europe.

King Titus Tatius was the name of a legendary ruler of the Sabines, an Italic tribe living near Rome around the 8th century BC.

[1] While the name later disappeared from Western Europe including Italy, it remained prevalent in the Hellenic world of the Eastern Roman Empire, and later spread to the Byzantine-influenced Orthodox world, including Russia.

In that context, it originally honoured the church Saint Tatiana, who was tortured and martyred in the persecutions of the Roman Emperor Alexander Severus, c. 230 CE.

Tatiana Larina is the heroine of Alexander Pushkin's verse novel Eugene Onegin.

Tatiana from Eugene Onegin by Elena Samokysh-Sudkovskaya , 1899.
Grand Duchess Olga Nikolaevna of Russia and Grand Duchess Tatiana Nikolaevna of Russia as toddlers. Tatiana (left, sitting) was named for Tatiana Larina in Eugene Onegin because her parents liked the idea of sisters named Olga and Tatiana as in the poem by Alexander Pushkin .
An icon of Saint Tatiana of Rome .