Here is my info in case anything fits with your family.
I am not sure if there is any connection but I am fasinated by your tree.
Bridget HALLOREN borm circa 1881. Unmarried in the 1911 census and living with her unmarried aunt Anne FENELON born circa 1856. at Miltown, near Bagenalstown, Co Carlow
James FITZGERALD and Kate Halloran were the sponsors at the wedding in 1876 of my GGrandparents Patrick Fenelon and Dora FLEMMING born circa 1845. They lived at Knocklonogad, near Bagenalstown Co Carlow.
Patrick Fenelon and Anne Fenelon were brother and sister.
Another point is that a lot of the family ended up in Chicago.
Could there be a connection between Florance Fitzgerald and James Fitzgerald.
There is also a family tale that Lizzie Fenelon born circa 1867, sibling to Anne and Patrick, married a Fitzgerald though I have hunted for proof of this without success. She emigrated to U.S and was in Chicago at some point.
I have not found the connection between Bridget and Kate but feel sure there is one.
As usual there may be variations in the spellings!
I look forward to hearing from you.