• Married: 14 Sep 1876, Sydney, New South Wales, Australia ^{1 2}
• Died: 16 Sep 1885, Sunnyside, Gladesville, Sydney, N.S.W., Australia ³

  Marriage Information:

Alexander married Harriet O'Donnell, daughter of Hugh Frederick O'Donnell and Jane McNulty, on 14 Sep 1876 in Sydney, New South Wales, Australia ^{1 2}. (Harriet O'Donnell was born on 19 Oct 1849 in New South Wales, Australia ^{4 5} and died on 1 May 1927 in Young, New South Wales, Australia ^{6 7}.)

  Marriage Notes:

" MILLER-O'DONNELL.— September 14, by the Rev. Dr. Lang, Alexander C. Miller, Sunnyside, Gladesville, to Harriet, fifth daughter of the late H. F. O'Donnell."