Let me summarize the little I know about the Hawthorns.
I have William Hawthorn being married to Margaret Carr.I believe I got the "Carr" from their daughter's death certificate.It said that Margaret Carr was born "East of the mountains".
I have them in the 1850 census in Perry Township, Jefferson Co, PA.: William Hawthorn age 34, farmer, born in Ireland Margaret Hawthorn, age 25, born in PA James Hawthorn, age 2 John H Hawthorn, age 1/12
In the 1860 census, in Oliver Township, jefferson Co, PA: William Hawthorn, age 45, farmer Margaret hawthorn, age 35 James L. Hawthorn, age 12 Mary Ann Hawthorn, age 7 Martha Jane Hawthorn, age 4 William A. Hawthorn, age 2
I have the 1870 and 1880 census on order
Mary Ann Hawthorn had a daughter Florence Mae McGee (or McKee) in 1877.I haven't discovered the father yet.
In 1880 Mary Ann married Levi Swab.I have their children as Ada Swab Smith, ida A. Swab Park and Walter A. Swab.Levi had some children prior to marrying Mary Ann and I do not know if any of these were from his previous marriage.
There is an obituary for William A. Hawthorne on the Jefferson County obituary board.He died Dec 3 1919.It says he was the son of William Hawthorn and born in Oliver Township.
I am a descendant of FLorence Mae McGee's.
Let me know if you have more...I can fill you in on this branch if you'd like it and we're sure there's a connection