According to a popular belief the area south of Tampa Bay was the domicile of the Calusa Indians. Whatever the origin of this dogma, it is likely connected with the fact that Narvaez and De Soto supposedly landed in Timucua Indian territory. How far south of Shaw’s Point this territory may have extended has never been delineated. Historically, north Florida east of the Aucilla River was inhabited by Timucua, and south Florida, south and west of Lake Okeechobee, by Calusa Indians. Archaeological evidence suggests that regional differences in material culture had existed for about 1,500 years before the coming of the Spanish in the sixteenth centudy. The languages spoken in these areas in prehistoric times are unknown.
Bullen, Ripley P.
"The Southern Limit of Timucua Territory,"
Florida Historical Quarterly: Vol. 47
, Article 7.
Available at: https://stars.library.ucf.edu/fhq/vol47/iss4/7