The adult sponsors in a quinceañera are commonly called padrinos in Spanish.
Padrinos is the plural of padrino, meaning godfather or sponsor; padrina may also be used for a female sponsor in some contexts. These adults can support the celebrant and family, participate in ceremonial roles, or help provide items connected with the event.
The term is related to the wider Spanish-speaking custom of choosing godparents or sponsors for important religious and family milestones. A quinceañera may have padrinos for a religious service, the reception, or particular symbolic gifts, depending on local practice.
Padrinos are not the same as the celebrant's court of attendants. The court generally consists of peers, while padrinos are usually adults who hold a sponsoring or supporting role. Families may use the word differently, so the exact duties are not universal.