Could not locate her proposed husband Walter Kilby. His supposed son John's parents were William Kilby and Sarah his wife.
While possible it is unlikely that her maiden name was Kilby since her supposed married name was Kilby.
I could not locate their proposed daughter Catherine either.
Further research is need on this profile.
Sources
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Please set the LNAB for this profile to Unknown.
Best, Sarah
Data Doctor, England Project Team Cornwall