Leonard was born in 1839 at Carnaby, Yorkshire, to parents John Mainprize, a shoemaker, and Jane Stephenson. He was baptised on 29 September 1839 at Carnaby.
Census returns identify the following occupations for Leonard.
- 1851 scholar
- 1861 PM minister boarding at Patrington, Yorkshire
- 1871 joiner – employing 3 men & 2 boys
- 1881 builder, 10 men and 2 boys
- 1891 builder
- 1901 retired builder
- 1911 private means
He married Sarah Ann Harrison (1843-1877) on 6 December 1869 at Christ Church, Bridlington, Yorkshire. Census returns identify one child.
- John William (1871-1945) – a chemist (1901)
He married Rhoda Louisa Harrison (1854-1936) on 22 October 1878 at St Mary, Hull, Yorkshire. Rhoda was a sister of Sarah Ann.
He died on 7 April 1921 at Bridlington, Yorkshire.
- 1861 Walworth
- 1862 Maidenhead
W Leary, Directory of Primitive Methodist Ministers and their Circuits, 1990
Census Returns and Births, Marriages & Deaths Registers
Note: The obituary reference in Leary does not apply to this travelling preacher, but to his grandfather.