Thank you both David and Jean for your responses- it certainly clarified a few things.

It may interest you to know that a manx born Arbory member of the I.O.M.F.H.S. searched for about five years for another illegitimate child called Ann Moore and wrote an article for the journal in Feb 1997 (pages 11 to 14)
This was entitled MOORE/SHARPE and had family tree diagrams.
These were for Moore/Sharpe and Crebbin/Sharpe/Kinley

My Paternal Great Grandmother was Elizabeth Moore of Arbory and my wifes Maternal Grandmother was Elizabeth Moore in Andreas however I am presently only taking a look at all Corlett events throughout the rest of the British Isles.
Peter.