Hi,
Henrietta was the fourth child of George and Martha. She married Joseph Sparrow in 1837. Her first child, Frederick, was born in 1836. No father given.
I have a George in my family but he was born in 1798 to John Beale and Jane Hughes who were my ggggrandparents and so I suspect that your Georges parents were George and Ann whose marriage I can't find at the moment. I have most of the church records for Hankerton and so will keep looking for you. Just to confuse things even more George (who married Ann) I believe was the son of another John and Jane. Was your George born around 1790?
Please let me know if this helps.
Gill.