The usual Spanish term for a boy’s counterpart to a quinceañera celebration is quinceañero.
Quinceañera traditions are most strongly associated with a girl’s fifteenth birthday, but Spanish-speaking communities also use quinceañero for a boy reaching the corresponding milestone. The masculine ending distinguishes the term from quinceañera.
The word should not be confused with chambelán, which traditionally identifies a male attendant or escort in a quinceañera court. A quinceañero is the celebrant, not an attendant.
Practices vary substantially by family, country, religion, and generation. Some families hold a traditional quinceañera, some adapt the event for a boy, and others create a joint or non-gendered celebration. The terminology is therefore useful, but it does not prescribe one universal format.