There is an article "Jonah Davenport, an Early Eighteenth Century Lancaster Indian Trader, his son, William Davenport, a Carlisle Saddler, and Grandson, Samuel Davenport, Trader General for the Tribes of Texas" by Ann Dubuisson in the Journal of Lancaster County's Historical Society, Summer/Fall 2011. You can get a copy by calling the Society in Lancaster, Pa. It has a web site and you can get the phone number there. I don't know the cost but it should not be much. About 22 pages, maps, documents, lots of sources cited, with leads for descendants. Let me know if you find anything concerning your family and where your family is located. I am in Kentucky.