James married Mary Arbogast on 10 Apr 1785 in , Augusta, Virginia, United States. Mary (daughter of Michael Arbogast and Mary E Samuels) was born about 1765 in , Augusta, Virginia, United States; died about 1794 in Pendleton Co., Va/Wv. [Group Sheet] [Family Chart]

1. Abraham Mullenax was born about 1786 in , Augusta, Virginia, United States; died before 1860 in Dry Run, Pendleton Co., Va/Wv.
2. William Henry Mullenax was born about 1788/9 in Pendleton Co., Va/Wv; died on 10 Sep 1848 in Dry Run, Pendleton Co., Va/Wv; was buried in Dry Run Cem., Pendleton Co., Va/Wv.
3. Jacob Mullenax was born about 1790 in Pendleton Co., Va/Wv; died in Aug 1846 in Highland Co., Va.
4. Rachel Mullenax was born about 1792/3 in Pendleton Co., Va/Wv; and died.
5. Joseph Mullenax was born about 1795 in Pendleton Co., Va/Wv; died on 12 Apr 1864 in Greene Co., Mo.