Goggle: Jackson Whites for a history. 'Jacks' were a slang term referring to freed blacks at the time. Also another theory part of the ancestry was from jamaican women captured to serve as , well, you know, to revolutionary soldiers in the area.
But, its more profitable to be an Indian nation these days.
I think that the Ramapough are recognized as a Lenape tribe. Not sure. But if they are, they date way back.