Sellers married Cornelia Wells (1831–1909) on October 8, 1851. They had four children:
Coleman Jr. (1852–1922),
Jessie (1855–1932),
Horace Wells (1857–1933), and
Harold (1875–1876).
Jessie married Sabin Colton, a prominent investor in Philadelphia and New York.
Sources
"Pennsylvania, Philadelphia City Death Certificates, 1803-1915," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/JNFD-9MQ : accessed 07 Nov 2014), Coleman Sellers in entry for Harold M. Sellers, 09 Jul 1876; citing , Philadelphia City Archives and Historical Society of Pennsylvania, Philadelphia; FHL microfilm 2027461.
"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M3WW-WC8 : accessed 07 Nov 2014), Coleman Sellers, Philadelphia city Ward 24, Philadelphia, Pennsylvania, United States; citing sheet 8A, family 136, NARA microfilm publication T623, National Archives and Records Administration, Washington, D.C.; FHL microfilm 1241465.