Known. Bones in a cemetery on Guadeloupe stayed whole, even though the soil there usually destroys them.
The site is at Les Abymes, on Grand-Terre, Guadeloupe's most populated island. The settlement and the burials were dated to about 750 to 1500 AD, the Late Ceramic Age. Bodies had been folded so they would fit, and that left the bones only partly covered by the acidic soil. Post holes show where houses stood. Pits held stone tools, pottery, heating stones, and bones and shells of land and sea animals.
The page says a full story of who these people were, and how they were related, is still unfinished.
https://www.ancient-origins.net/news-history-archaeology/guadeloupe-burials-0015334