I have this family in my tree, however I have William Lawson as William M. Lawson and this is probably due to the fact that his mother was Mary Ann McKee and not Elizabeth A Dougherty. William M.Lawson is the brother to Isham Lawson born 1793 died 1869, I was able to locate more information on this family due to your post, I believe the M in Williams name stands for McKee, I could be mistaken but this is what I think, feel free to join with my tree. and as for Nancy Lawson I havent come up on her with that dob, but will look as I progress. thank yo for posting!