Thanks for the feedback.I don't know a lot about William and Margaret myself.
In the 1860 census the children's ages were: James - 12, Mary Ann - 7, Martha Jane - 4 and William A. - 2.
The obituary for Mary Ann Hawthorn Swab (she died June 30, 1919) listed her brothers as James and W.A. Hawthorn of Sprankle Mills, H.G. Hawthorn of West Hickory, Forest County and Mrs. Amanda J. McMillen of Sabula (listed under "Brothers surviving", but I assume it's a sister.)