Quinceañero is the masculine Spanish term for a boy reaching the traditional fifteen-year milestone.
The word is formed from quinceañera by using the masculine ending -ero. It can describe the male honoree in a quinceañera-style coming-of-age celebration, although the tradition has historically been associated much more strongly with girls and the feminine term.
A quinceañero should not be confused with a chambelán. A chambelán is a male attendant in the court of honor, while a quinceañero is the person whose fifteenth birthday is being marked. The distinction matters because both may appear in the same formal celebration.
Terminology and customs vary across Spanish-speaking communities. Some families create a celebration modeled on the traditional quinceañera, while others use different names or emphasize a religious, family, or birthday gathering instead. The word identifies the honoree’s role rather than prescribing a particular ceremony.