My mother is the daughter of Thomas O'Halloran(Married Bridget McNally 1927) of Belfast, His father was Patrick O'Halloran (married Mary Anne McKeown October 1890) who had brothers Thomas and John. Their father John was born in Co. Kerry around 1844 and married to Elizabeth Carville from Co. Down in Belfast 01/02/1869 his father was called Patrick. I have also found a Thomas O'Halloran who was born in County Clare around the 1870's and died in Belfast (I have death certificate and census records 1901). Hope this may help you. If you have any info on any of the above let me know I would be interested in the Birth of Patrick around 1877 in Co Kerry.