The Spanish name for the girl whose 15th birthday is celebrated is quinceañera. The same word is also commonly used for the entire celebration, depending on context.
The term comes from quince, “fifteen,” and a feminine form related to the person reaching that milestone. In English-language writing, quinceañera can therefore mean either the honoree or the event itself. Context usually makes the intended meaning clear: a family might say that the quinceañera chose a blue dress, or that the family planned a large quinceañera.
The word is often written with the ñ and the accent mark in Spanish. “Quinceanera” is a common English keyboard spelling, but quinceañera is the standard Spanish form.
Other specialized terms identify participants in the ceremony. Damas are female attendants, while chambelanes are male attendants or escorts in many versions of the tradition. They are not names for the honoree herself.