It might be an idea to post some dates and give your sources for your knowledge of the brothers’ origins. How sure are you that they came from Fermanagh? The name is rare there. There are no Bradens in Fermanagh in Griffiths Valuation (1847 – 1864) and none in the 1901 census for Fermanagh. How sure are you that they come from this part of Ireland?
If you are unsure where they came form, I suggest you re-post this on the Ireland general board (with some approximate dates).