Hi there,
I know this thread is a bit old but am hoping some of you are still about. My great-great-great-great-grandmother was named Mary Cardiff and was married to John Lowe White of Tacumshane (County Surveyor for Wexford and Wicklow). John Lowe White died 2 Jn 1893 in Ballycushlane, Lady's Island. His parents were John Lowe White and Dorothea Boxwell. I have a good bit of info on the White/Boxwell side of things but can't seem to find anything else on Mary Cardiff. No idea of DOB, would have been probably somewhere between 1800 and 1825 based on ages of her children. I know she died before her husband (so before 1893).
If any of this ties in with any of your Cardiffs I'd love to hear from you!