Thanks for this
So far I have:
Catherine Johnston b 1827 -1829 Ireland, m 1/12/1844 Cork, d 6/4/1909 Glasgow aged 78
Henry Shumacker b 1819-23 Hanover, m 1/12/1844 Cork, Sugar boiler
Henry Shumacker b 1846 Cork, m 5/2/1878 Glasgow, d 31/3/1899 Seaman
Information from birth certificates, death certificates and 1861 & 71 censuses
I have seen the Noble Johnson in Rockingham, Cork in Griffiths valuation but I have been unable to connect this to my Catherine Johnston.
I have not been able to find the birth of Catherine or wedding of Catherine & Henry or the birth of their son Henry.
They named one of their children Noble Shumacker (b 1851), so this ties in with Catherine's father being Noble Johnson.
I think that the family must have left Ireland between 1852 and 1858
I will follow up with some of the resources mentioned
Catherine's death certificate gives her fathers occupation as brewer.