On my public family tree on Ancestry.com you can check out the Healy/Haleys in my ancestry to see if they are related in any way to the Healys you are researching. If I can help you, let me know.
From what I can determine, my Healys came from the Fitzwilliam Estate, Co. Wicklow, Ireland, around or just prior to the potato famine. They lived and worked on the estate and were put off it due to policies enacted by Lord Fitzwilliam at that time.
Good luck with your search! Maureen