Ancestry DNA Connections West Galway

I am looking for some help in sorting out my DNA matches in West Galway. My DNA shows that I am connected to the family names Rattigan, Duignan, Keane, Greene and Halliday. Now the question is how to establish where the connection happens. After many hours of research I have been unable to solve question. Any and all suggestions on how to help solve this would be appreciated.

My Family lines in Oranmore Galway : John Bench (1800 – 1850) and Ellen Finnegan (1805 – 1888)

Paul