John Sherry (m to Hannah Kelly) is eluding me at the moment. He said he was born Cadder, LKS but I can't locate him there. It could be that his earliest memories where there.
This is the most likely at the moment on the 1851 Census:
21 Muir Street, Hamilton, Lanarkshire
647 ED 2A Household No. 24
John Sherry, 21, labourer, b. Down, Ireland
Eliza, 30, b. Down, Ireland
John,3, b. Stirlingshire
Margaret, 1, b. Hamilton