This is very exciting, although I admit I am also confused.
First of, its great that you've found William, I couldn't find his birth cert but knew he existed from speaking with Nan, and finding his WW1 enlistment papers.
Its interesting that only William and Caroline were baptised, I wonder why George, John and Alfred weren't?
I have the birth certificates for Caroline, John and one other (name eludes me at present) but they are all named ..... Evenden. But father is not noted, could it be telling that the children are still named after their father's family?
Sarah Ann did die in or after child birth, she was in labour for 4 days! I didnt know that the child survived, even if only for 4 weeks. It sounds like they had a sad couple of years after marrying.
The Sharwoods seem to be an 'interesting' family, having spoken to another rootschat member who is also researching the same family, it seems that they were not particularly esteemed within his family and there was also apparently a murder.

Im confused about the Lying about the surname thing, could you explain again please. I'm probably just being a bit dim but im lost with who is who

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Thanks for all your help.