The Ati are a Negrito ethnic group indigenous to Panay Island in the Philippines, believed to have arrived from Borneo 20,000 to 30,000 years ago. They practice animism alongside Christianity and are known for their herbal medicine, traditional rituals, and unique marriage customs. The Ati are central to several local festivals, such as the Ati-Atihan and Dinagyang, which celebrate their heritage and the integration of cultural practices.