You can write to The Ethan Allen Homestead Trust, Burlington, VT, 05401-1141. They have a booklet on Ethan Allen. cost $15.50 (a couple of years ago). But you will probably have to work your way back many generations to make a connection. There are many stories in Allen families that they were related to Ethan Allen but in fact are not related. Many just because they were in Rev. War with him or just lived in Vermont.