It's a long shot but there may be some connection.
My family originally came from Arigna, County Roscommon, Ireland. Their surname was Kilday or Kildea. My great grandfather, James Kilday (Kildea), born 1840, moved from Ireland to Dalry, Ayrshire.
There were a group of people who moved into Ayrshire from Arigna about this time. Maybe your ancestor Helen Kildea is related to this group of Kildays or Kildeas. My ancestors were miners in the iron mine at Arigna. When they moved to Dalry they worked in the coalmines there.
You may be able to get some records from the Scotish Records Office. I got some birth, death and marriage certificates relating to my own ancestors. Their records go back to about 1861.
Hope this may be of some help.