|Vice President||John Christchurch|
|Born|| February 10 1966|
|Children||Emilia, Maria, Olivia, Sophia|
Johnson is the middle child of landowner Michael Thornton (born 5 July 1934), and his wife Anna Thornton (9 October 1939 - 6 March 2013, previously Anna Home). They married on 23 December 1959.
He has an older sister, Samantha Mack (born 4 January 1961, previously Samantha Thornton, married to Henry Mack), and a younger brother, William Thornton (born 29 January 1969, married to Elizabeth Thornton).
He is married to Julia Thornton (10 March 1966, previously Julia Smith). They married on 6 May 1987, and together they have had 4 daughters, from 1988 to 1997, two of which are now married.