Noticed this thread has been awhile ago found this by chance. My mother is Joan O'Reilly daughter of George and Agnes O'Reilly Jerseyside. As far as going that far back I know my mom and my Uncle named Cyril O'Reilly son of Agnes and George have done a lot of research looking for a sister. They are unable to locate any birth or death records for her although she was born somewhere between 1936-1941. My moms email address is
Joanfanton@watsonrealtycorp.com.
Not sure this isn't to late but I'm sure my mom could help fill in some gaps. If you show that George and Agnes had a daughter prior to Joan I am trying to pull as much of the history that I can putting a book together for my mom for her birthday this year.