The Spanish name for the young woman celebrating her 15th birthday is quinceañera.
The word is formed from quince, meaning 15, with a feminine ending associated with a person connected to that age or celebration. In English-language writing, quinceañera is also frequently used as a noun for the entire party, so context determines whether it means the celebrant or the event.
A quinceañera may appear with a court of honor, often including chambelanes and damas. The court can accompany her during a formal entrance, choreographed dances, or a waltz. Its size and composition vary, and modern celebrations do not always include one.
The term should not be confused with madrina, which means a female sponsor or godmother, or with dama, which can mean a female member of the court. Those are roles connected with the celebration, not names for the birthday girl herself. The quinceañera is the central celebrant.