Variant of Agatha, from Greek 'agathos' meaning good or virtuous.
Agata is the Italian and Polish form of Agatha, a name whose Greek root *agathos*—meaning good, honorable, virtuous—places it among the small group of names that aspire to moral description rather than mere identification. *Agathos* was one of the central virtues in ancient Greek ethical thought, the quality of excellence that Aristotle and Plato debated as fundamental to the good life. To name a child Agata was, in a sense, to declare a philosophical intention.
Saint Agatha of Catania, martyred in Sicily around 251 AD during the Decian persecution, became one of the most venerated women in early Christianity. Her story—of refusing the advances of a Roman official, suffering torture including mutilation, and dying in faith—made her a symbol of chastity and courage. She became patron saint of Sicily, of bell-founders (after a legend that bells were first cast in her honor), of breast cancer patients, and—in a geological extension—of volcanic eruptions, since Catania sits in the shadow of Mount Etna and her veil was said to have stopped a lava flow.
Her feast day, February 5, is still celebrated with remarkable intensity in Sicily. In Italy and Poland, Agata has maintained steady use across centuries without ever becoming fashionable in the exhausting sense—it is simply a name that belongs to the landscape. In English-speaking countries it has gained traction as a distinctive alternative to the more familiar Agatha, associated warmly with Agatha Christie, the queen of crime fiction. Agata carries all of that heritage while feeling slightly fresher, its ending open rather than closed.