Thania is a variant of Tania, a diminutive of Tatiana, a name tied to an ancient Roman family name.
Thania is most likely a melodic variant of Tania, itself a diminutive of Tatiana — a name of Roman origin from the Tatius family, which Roman legend connects to Titus Tatius, the Sabine king who co-ruled Rome with Romulus. Tatiana became enormously popular in the Eastern Orthodox Christian world through Saint Tatiana of Rome, martyred in the 3rd century and venerated especially in Russia, where Tatiana Day (January 25) is celebrated as a student holiday.
Thania strips the name to its lyrical core, creating something that feels both antique and contemporary. Alternately, some scholars and name enthusiasts read Thania as rooted in Greek, where the 'than-' stem connects to 'thanatos' — death — though in practice Thania is overwhelmingly associated with the Tatiana lineage rather than any morbid etymology. In Spanish-speaking Latin America, Thania circulates as a given name with a distinctly cosmopolitan flair, favored by parents who want the warmth of Tania with a slightly more sculptural, formal spelling.
The name appears in Mexican, Colombian, and Venezuelan naming records with some regularity from the 1970s onward, often given to daughters whose parents had an appreciation for names that felt both international and softly feminine. Thania has a particular rhythmic grace — the 'th' breath, the open 'a' vowels — that gives it an almost musical quality when spoken aloud, landing somewhere between intimate and ceremonial.