I've tried just concentrating my research on Catherine or Eliza Ann (name variants, wildcard, BMD, immigration etc)...nothing on Irish Genealogy, FamilySearch, Ancestry...
But maybe it's worth starting afresh and going over information again. There's so much of it, it's very possible I've missed things along the way.
Thank you for all your time and suggestions. It has brought to light some of the weaker areas of my research I need to go back on.