https://en.m.wikipedia.org/wiki/Acadians
The Acadians (French: Acadiens [akadjɛ̃], Acadian French: [akad͡zjɛ̃]) are an ethnic group descended from the French who settled in the New France colony of Acadia during the 17th and 18th centuries. Most Acadians live in the Northern American region of Acadia, as it is the region where the descendants of a few Acadians who escaped the Expulsion of the Acadians (aka The Great Upheaval / Le Grand Dérangement) re-settled.
Many Acadians were eventually recruited by the Spanish government to migrate to Luisiana (present-day Louisiana). These Acadians settled into or alongside the existing Louisiana Creole settlements, sometimes intermarrying with Creoles, and gradually developed what became known as Cajun culture.
Coonass, or Coon-ass, is a term for a person of Cajun ethnicity. Some view it as derogatory, however many Cajun embrace the name. The term is believed to originate from the French word conasse, meaning a fool. (I think it means something worse than "fool")