I need to clarify my first message now that I have more information to work with.
My Bridget McDonough/McDonagh was married to Patrick Sullivan on 18 AUG 1884. According to her marriage record, she was born approximately 1858. Her father's name on the record was John McDonogh. Witnesses to this marriage were Michael McDonogh and Bridget Walsh.
I was incorrect in saying that Delia and Bridget were sisters. Delia was Bridget. Her age and other factors indicate that she could never have been the sister of Bridget MCDonough who married Pat Mullen.
We are still certain that Bridget MCDonough's daughter is related to the Sullivan/Lee family from my first message. We just are unaware how. My grandmother indicated that Barbara Mullen, the actress, was her cousin. There are more than a few McDonagh families connected to the Sullivan/Lee family. I'm sure if my grandmother were around she could clear this up for us. Too bad I didn't pay more attention when I was younger.
I would appreciate any information on the Martin McDonough whose children include Mary and Bridget. Perhaps Martin and my Bridget are siblings. They are closer in age. That would certainly explain some things. Do you know who Martin's father was?