By 1675, they had abandoned Cumberland Island and relocated south, where they merged with other Timucua peoples and lost their independent identity.
An archaeological site extending from the Dungeness mansion ruins northward along the shore has been identified as the probable location of Tacatacuru.
To the east of the Tacatacuru on the mainland were speakers of the Yufera and Itafi dialects of Timucua; named tribes include the Ibi and the Cascangue or Icafui.
[4] Cumberland Island and the surrounding area were inhabited for thousands of years by indigenous peoples who preceded the Tacatacuru; these early settlers often lived there in seasonal fishing camps.
The Chief Tacatacuru mentioned in French records from this time may be the earlier leader who met the initial expedition, or his successor.
In the late 16th century the Tacatacuru chief, Don Juan, was a major supporter of cooperation with the Spanish, and joined them in pushing back the Guale in the revolt of 1597.
However, increased pressure from other tribes took its toll on the Tacatacuru, and all survivors abandoned Cumberland Island by 1675, relocating closer to St. Augustine.