I have seen some clues about the Pell-Indian connection...I do know PELLS is a Wampanoag Indian surname from Mashpee,Massachusetts...it is remotely possible that it originated close-by in Westchester County New York from the earlier Pells...as I haven't found any Pells in Mashpee before about 1800....not very far away from Westchester County...My Wampanoag ancestors (no Pells) were from Cape Cod and Rhode Island.......Best of luck finding your remote family members...