Quinceañero is the Spanish word commonly used for a boy celebrating the male counterpart of a quinceañera.
The term is formed from quince años, meaning “fifteen years,” with the masculine ending. A quinceañero celebration adapts the fifteenth-birthday milestone for a boy, although the exact customs depend on the family and community.
The better-known word quinceañera is grammatically feminine and traditionally refers to both the girl celebrating and, by extension, the celebration itself. Quinceañero is the masculine form used when the celebrant is male. In English-language communities, families may use different names for the event.
A quinceañero should not be confused with chambelán. A chambelán is a male attendant in someone else’s court of honor; a quinceañero is the person whose fifteenth birthday is being celebrated.