I cannot speculate on a possible connection between your ancestors and the Darby Kealey line but the names you provided prompt me to wonder whether we are cousins.
My Mother is a Kealey.In her family tree we can find the children Donald, Glen, James and Maureen.Their parents were Alban Kealey and Eva Eliz. Donaghue (b. about 1910).Alban's parents were Paul Kealey and Cath. "Kitty" Kelly. [His brother John was my grandfather].The next parents were Nicholas Kealey (b.1835) and Cath. Fahey.We believe but cannot yet prove the next parents were also a Nicholas Kealey and a Margret Cody.Does any of this rings bells?- Will Dunlop, Ottawa