The common Spanish name for the male lead dancer or escort in a quinceañera is chambelán.
A chambelán may be the honoree’s principal escort or one of several male members of the court of honor. Depending on the family’s customs, he can accompany the quinceañera during her entrance, participate in formal photographs, and dance in the choreographed presentation.
The plural form is chambelanes. Female members of the court are commonly called damas. Terminology can vary by country and community, so not every celebration uses a formal court or a designated lead escort.
Quinceañero is a different word: it generally describes a boy celebrating his own fifteenth birthday. Padrino means godfather or sponsor in relevant ceremonial contexts, not specifically the male dancer.