William was born in 1842. He is the son of William Mills and Eliza Ward.
He was a "store clerk" when he married widow, Ophelia Angelina Airth (nee Wright) on July 9, 1873 in Smiths Falls, Lanark county, Ontario. Witnesses were Donald and Robert Stewart of Renfrew.
He and Ophelia had 2 daughters before she died in 1876: Louisa Evans Mills in 1874 and Ophelia Caroline in 1875.
On June 21, 1887 in Lochwinnoch, Renfrew county, Ontario, William age 44 married again to widow Margaret Griffith age 30, daughter of Adam and Catherine McTavish.William and Margaret were the parents of 3 sons: William in 1888, Leslie Lewis Steadman in 1890 and Arthur McTavish in 1894.
↑ "Ontario Marriages, 1869-1927," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:FMFB-HZZ), Fanny Stevens in entry for William Mills and Ophelia Airth, 09 Jul 1873; citing registration , Smiths Falls, Lanark, Ontario, Canada, Archives of Ontario, Toronto; FHL microfilm 1,862,699.
↑ "Ontario Marriages, 1869-1927," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:FMJY-56J), Catherine Mctavish in entry for William Mills and Margaret Griffith, 21 Jun 1887; citing registration , Lochwinnoch, Renfrew, Ontario, Canada, Archives of Ontario, Toronto; FHL microfilm 1,870,218.