Sereia means mermaid in Iberian usage and comes from the same classical root as siren.
Sereia is the Portuguese word for mermaid, and using it as a given name is a tradition most associated with Brazil, where it carries an extraordinary cultural weight. The word descends from the Latin *siren* — itself from the Greek *Seirēn* (Σειρήν) — the enchanting sea creatures of Homer's *Odyssey* whose irresistible song lured sailors to their deaths. In Greek myth the Sirens were originally bird-women perched on rocks; the shift to the fish-tailed form familiar today came through Roman and later medieval European iconography.
In Brazil, the figure of the sereia merges with the Afro-Brazilian spiritual tradition of Iemanjá — the Yoruba orisha of the ocean, mother of waters, Queen of the Sea — who is frequently depicted as a beautiful woman rising from the waves. This syncretism between indigenous aquatic mythology, African religious tradition, and European mermaid lore gives Sereia a layered spiritual significance in Brazilian culture that goes well beyond a simple nature name. Offerings to Iemanjá are floated on the sea each February 2nd in a mass ceremony on the beaches of Salvador and Rio de Janeiro, and the sereia is her symbol and emissary.
As a given name, Sereia has grown in visibility beyond Brazil through the Portuguese diaspora in Europe and North America, and through a broader international appetite for names meaning "sea" or evoking aquatic beauty. Its four syllables fall in a rolling, musical pattern — se-RAY-ah — that feels both exotic and immediately pronounceable. It is a name that carries mythology, spirituality, and the sea itself in its sound.