Hi Pam
I believe we are related!
My great grandparents were James Fitzroy and Margaret Finlay.
Dad's mum was Margaret Fitzroy - I think she was sister to your g/g/grandfather John.
Hope I've got this right but I understand the family inlcuded - John, Tom, Margaret (my grandmother, who died at a fairly young age), Lil, Cissie (who I remember slightly as she lived with us before her death) Mabel, Bob (who emigrated to USA) and George (also emigrated?).
Eva (from fitzroy line) died some time ago: Madge- her sister also died very, very recently.
Tracing the Fitzroy chain is not easy, apart from the information relating to corn miller/grocer/farmer which you now know!
Perhaps we should make contact? My parents would be delighted to hear more about your family.
Judith.