A boy's 15th-birthday celebration modeled on a quinceañera is commonly called a quinceañero.
Quinceañero is the masculine Spanish form associated with a young man reaching age 15. Some families use the term for the celebrant, the event, or both, while others simply call the occasion a quinceañera regardless of the participant's gender.
The masculine form is less standardized in English-language usage because quinceañera became the much more familiar name for the tradition. In contemporary communities, boys may participate in quinceañera-style celebrations with formal clothing, family ceremonies, dances, and large receptions.
Terminology is not identical everywhere. Spanish-speaking countries and individual families may choose different names or adapt the format. The important distinction is that quinceañero identifies a male celebrant or male version of the 15th-birthday tradition; it is not the name of a separate universally defined religious sacrament.