I was wondering if this was there daughter as well but don't think it's the right Patrick & Ellen.
I am starting to think that Maria was an assumed name and not a birth name.
I started looking at the familysearch.org site and tried some variations and decided to check the birthdates and the last name.
I see there is a Catherine Dolan born Dec. 24, 1853 in Boston, Mass. Parents: Patrick & Margaret.
I'm beyond lots/confused with this right now. I am wondering if she was adopted by the Dolan family now??