John Brockman,b.Dec.25,1811, d.Jan.21,1876. Married Mariah Cowen b.Oct.26,1817 Smith Co.Tenn. D.Oct 18,1854 Putnam Co.,Tenn. she was daughter of Matthew Cowen b.1776 in Va. d.March 21,1865 Married March 8,1800 in sumner Co.,Tenn. to Catherine Trousdale b.Dec.19,1782 in Orange Co.N.C. to James Trousdale and Elizabeth Dobbins. Catherine died April 6,1866 in Putman Co.Tenn.Catherine was also sister to Govenor William Trousdale of Tenn. John and Mariah had a daughter Ordelia Brockman who married Jasper J. McDonald Dec.7,1864 Matthew Cowen is my ggg grandfather. Hope this helps. Pat P.