Timucuan
The Timucua were a people who lived in the area that today encompasses NE Florida, extending SW to Central Florida, NE to SE Georgia. It stretched from the Altamaha River and Cumberland Island in present-day Georgia as far south as Lake George in central Florida, and from the Atlantic Ocean west to the Aucilla River in the Florida Panhandle (though it reached the Gulf of Mexico at no more than a couple of points).
They were the largest indigenous group in the area and consisted of about 35 chiefdoms, some leading as many as a thousand or more people. The various groups spoke several dialects of what is now called the Timucuan Language. At the time of European contact, the territory occupied by speakers of Timucuan dialects covered about 19,200 square miles, and was home to as many as 350,000 people.
Ironically, the name 'Timucuan' derives not from what the natives called themselves, but from their word for 'Enemy' - 'ThImagonna*.'
(* Spelling approximate)