Hi Carol
On the British census it stated that Simon was born in 1838, so I guess that is about right, although perhaps it could be a couple of years either way.
Johanna was born 1839, bit not sure how accurate that date is, I am sorry but I don't know anything about Johanna, not her maiden name or anything. Simon was a shoemaker.
I am hoping that they were indeed came from Kilrush, and I wish I had more info for your very kind friend. I hope one day to be able to return the kindness of you all, for your help.
Please tell your friend how very grateful I am, and that I hope she has a lovely time in Ireland.
Have a lovely day.
Ginny