The 1851 census shows John & Charlotte HOWARD living at the same address - Calves Bridge Cottage - as William & Ann HOWARD - possibly John's parents. Have you obtained the marriage certificate for John & Charlotte as this will confirm his father's name and occupation. Charlotte's father's name may also be given. John also appears to be living with William & Ann in the 1841 census. Lapford baptisms and marriages are available to view in the DFHS members' area.