William married Julia Ann Bullard on 3 Mar 1856 in Coweta County, Georgia, USA. Julia (daughter of Robert William Bullard and Catherine Bullard) was born on 17 May 1839 in Coweta County, Georgia, USA; died on 24 Mar 1897 in Rico, Coweta County, Georgia, USA; was buried in Palmetto, Fulton County, Georgia, USA. [Group Sheet] [Family Chart]

1. William Robert McMillan was born in 1858 in Georgia; died on 1 Mar 1917.
2. Mary Kate McMillan was born on 3 Jan 1861 in Coweta County, Georgia, USA; died on 10 Aug 1916 in Mableton, Cobb, Georgia, USA; was buried in Austell, Cobb County, Georgia, USA.
3. Charles Alton McMillan, Sr. was born on 18 Oct 1866 in Coweta County, Georgia, USA; died on 20 Feb 1942 in Palmetto, Fulton County, Georgia, USA; was buried in Palmetto, Fulton County, Georgia, USA.
4. James Marion McMillan, Sr was born on 22 Sep 1871 in Newnan, Coweta, Georgia, USA; died on 9 Dec 1946 in Atlanta, Fulton, Georgia, USA; was buried in Palmetto, Fulton County, Georgia, USA.
5. Martha Eugenia McMillan was born in Aug 1873 in Coweta County, Georgia, USA; died on 10 Dec 1919 in Palmetto, Campbell & Fulton County, Georgia, USA; was buried in Palmetto, Fulton County, Georgia, USA.
6. Jenie Mc Millen was born in 1874 in Georgia.
7. Favey Mc Millen was born in 1878 in Georgia.
8. Octavia McMillan was born on 2 Jun 1879 in Coweta County, Georgia, USA; died on 27 Nov 1934 in Mableton, Cobb County, Georgia, USA; was buried in Austell, Cobb County, Georgia, USA.
9. Minerva McMillan was born in May 1881 in Campbell County, Georgia, USA; died on 27 Nov 1901 in Palmetto, Campbell County (Goode Dist.), Georgia, USA.