Thank you for your reply. The date of birth was a problem. I have her age from her death certificate. I could try and follow Henry Schumacher and Margaret Johnson forward to rule them out.
I know my Henry Schumacher and Catherine Johnson left Ireland relatively soon after their marriage in 1844. They had a child in England in approx 1852. I believe they had three children in Ireland, Henry, Mary and Noble. I have no birth details for any of these children. Their first daughter was called Mary, presumably after her maternal grandmother, Mary Edwards, and another daughter Catherine, presumably after her mother.
The Noble Johnson that appears frequently in the records is, to my best knowledge, gentry. ‘My’ Noble Johnson was a brewer.
I have the death certificate for Catherine Schumacher, in 1909. That is how I know the name of her parents, Noble Johnson and Mary Edwards. Her age is given as 78.
I have her on the 1891 census age unclear
I have her on the 1871 census as 44
I have her on the 1861 census as 32
These point to her age at marriage in Cork on 1Dec 1844 as ranging from 13 -17. I believe both her parents were dead by 1844