Thank you for your helpful research and suggestions! If only I could find a marriage record! The names of William Harpham's children were Julia J. (b: 1836), Charles (b: before 1843), Clarantine A. (b: 6 Oct 1843), George H. (b: 6 Apr 1850 - Commerce, Oakland Co., MI), and Robert John (b: 12 Mar 1847 - Commerce, Oakland Co., MI).