Robert married Serilda Catherine Sponaugle on 23 Aug 1891 in Pendleton Co., Wv. Serilda (daughter of George Washington Sponaugle and Elizabeth Susan Judy) was born on 1 Nov 1868 in Pendleton Co., Wv; died on 16 Jan 1962; was buried in Cedar Hill Cem., Franklin, Pendleton Co., Wv. [Group Sheet] [Family Chart]

1. Carrie Susan Mullenax
2. Willie H. Mullenax
3. Etta Carrie Mullenax was born in 1892; died in 1894.
4. Edward Jacob Mullenax was born in 1892; died in 1918.
5. Mary Ellen Mullenax was born in 1894; and died.
6. Luther Lee Mullenax was born on 19 Sep 1896; died on 20 Dec 1974.
7. Fannie MacEl Mullenax was born in 1905; and died.
8. Myrtle Annie Mullenax was born on 16 Dec 1905 in Cherry Grove, Wv; died on 28 Nov 1975 in Alliance, Oh; was buried in Cedar Hill Cem., Franklin, Pendleton Co., Wv.
9. Mattie Lucille Mullenax was born on 5 Jan 1915; died on 28 Nov 1973.