• Born: 1858, Ryde, Sydney, N.S.W., Australia
• Married: 4 May 1881, St. Anne's Church, Ryde, Sydney, N.S.W., Australia ^{1 2}

  Marriage Information:

John married Florence Jane Farnell, daughter of James Squire Farnell and Margaret O'Donnell, on 4 May 1881 in St. Anne's Church, Ryde, Sydney, N.S.W., Australia ^{1 2}. (Florence Jane Farnell was born on 30 Jan 1860 in Kissing Point, Ryde, Sydney, N.S.W., Australia ^{3 4} and died on 11 Dec 1947 in North Sydney, New South Wales, Australia ^{5 6}.)

  Marriage Notes:

"MARTIN-FARNELL.—May 4, at St. Anne's Church, Ryde, by the Rev. H. H. Britten, assisted by the Rev. William Lumsdaine, John Alexander, eldest son of the late Alexander Gregory Martin, of Sydney, to Florence J., third daughter of the Hon. James Squire Farnell, Squireville, Ryde, Parramatta River."