A male celebrant marking his fifteenth birthday is traditionally called a quinceañero.
Quinceañero is the masculine Spanish counterpart of quinceañera when referring to the young person celebrating the milestone. The feminine noun is much more widely recognized because the tradition has historically centered on girls, but boys and young men may also have fifteenth-birthday celebrations using related customs.
The word is formed from quince, meaning fifteen, with the Spanish personal ending -añero. It should not be confused with chambelán, a term used in some celebrations for a male member of the court of honor. A padrino is a sponsor or godparent-like supporter, not the celebrant.
Practice varies substantially. Some families use quinceañero for the celebrant, while others simply describe the gathering as a fifteenth-birthday celebration. The terminology can therefore depend on regional Spanish and family preference, but quinceañero is the standard masculine form associated with this tradition.