The only Leah GOODMAN I can find is:
HO107/1876 Folio 9, Page 10
Wodden House, Kingsbridge, Devon
William GOODMAN Head Marr 38 Ag Lab b. Chivelstone, DEV
Eliza GOODMAN Wife Marr 29 b. South Pool, DEV
Leah GOODMAN Dau 9 Scholar b. West Alvington, DEV
Elizabeth GOODMAN Dau 11 b. Kingsbridge, DEV
Thomas SOUTHWOOD Neph 2 b. West Alvington, DEV
A marriage is shown in Plymouth in 1866 for a Leah GOODMAN, but not to a Robert KENNARD.
The 1861 census shows a John KENNARD born 1799, Loddiswell, Blacksmith, married to a Mary ANn b. 1801, children: James 22 & Robert 18, both Smiths, all living in Loddiswell.
The same family is also shown in 1851, with children: John 19, Mary A. 15, James 12, Susan 10 and RObert 7.
So, as Trish rightly points out, there are 2 John KENNARD families. Which is yours?