Mackarness was the second son of John Mackarness, a West India merchant of Elstree House, Bath.[3] His older brother John was the Bishop of Oxford[4] from 1870 until 1889.[5] His younger brother Henry was also a vicar.[6]
He was married to Mary Ann Young, who died on April 15, 1873.[9][10] They had one child, George Evelyn Mackarness.[11] Five years later he married Gertrude Granville.[9]
^Bertie, David (2000). Scottish Episcopal clergy, 1689-2000. Edinburgh: T & T Clark. p. 208. ISBN0-567-08746-8.
^W. P. Courtney, ‘Mackarness, John Fielder (1820–1889)’, Ellie Clewlow, Oxford Dictionary of National Biography, Oxford University Press, 2004 accessed 17 July 2013