There has been another book on Bonar with more recent lines in it. The person who did it was Wilma Bonar. She's located in KY, but has no e-mail address. My sister and I just happened upon it on our trip to gather more info on our line of Bonars in KY. I have an address if you would like it. Or, it may be better if I have her contact you. I believe it's $20.00 for her book.
If you want more info, please contact me by e-mail. I'm posting this under my sisters account. Mine is firstname.lastname@example.org
Let me know.