What is the formal group of attendants surrounding a quinceañera called?

The formal group of attendants surrounding a quinceañera is called the court of honor.

A court of honor traditionally accompanies the celebrant during formal portions of the celebration. It may include damas, or female attendants, and chambelanes, or male attendants. Members can participate in the entrance, ceremonial presentation, photographs, and rehearsed dances.

The court creates a pageant-like structure around the honoree, but its size and membership are not fixed. Friends, siblings, cousins, or other relatives may be invited. Some families select only a few attendants, while others choose a larger group; contemporary celebrations may dispense with the court entirely.

The court of honor should not be confused with the sponsors, often called padrinos and madrinas. Sponsors may help with expenses or ceremonial items, whereas court members primarily accompany and participate in the event. The terminology can vary across Spanish-speaking communities.