The Original Land Owners of Washington DC, of course were the various Indian tribes. The first Europeans are listed in a wonderful little booklet Original Patentees of Land at Washington Prior to 1700, by Bessie M. Gahn. It was first published in 1936. In 1998, the booklet was reprinted by Clearfield Publishing. It list names, the first maps of DC, and in some cases Folder numbers in the Maryland State Archives. Virginia Archives have some information also. The price is modest for Gahn's booklet and I would urge anyone interested in DC area history, to purchase it. I will, of course, do look-ups. Helen