What is the name of the formal group of attendants often accompanying a quinceañera?

The formal group of attendants accompanying a quinceañera is called the Court of Honor.

A Court of Honor commonly consists of friends or relatives of the celebrant. Depending on the family and region, it may include young women called damas and young men called chambelanes, although the membership can be arranged differently today. The attendants often participate in photographs, the entrance procession, and choreographed dances.

The court helps give the reception a ceremonial structure. It can also symbolize the celebrant's community of family and friends as she reaches a new stage of life. Modern quinceañeras frequently adapt the tradition, including same-gender attendants, mixed groups, or no formal court at all.

The title can be confused with royal terminology because the celebration may include a tiara and formal presentation. In this context, however, Court of Honor refers specifically to the celebrant's attendants.