Bridget is her aunt. Timothy's daughter Kathleen married Chris Mara, Senior Player Personnel Executive for the Giants and son of Wellington Mara. I guess he was the disliked child since his brother is the president, CEO, and face of the ownership group.That sounds like when I learned several years ago Rooney Mara is related to both the Rooney family and Mara family. She's a Steeler/Giant
Edit: Then there's this
Rooney Mara's maternal grandfather, Timothy James "Tim" Rooney, has run Yonkers Raceway & Empire City Casino in Yonkers, New York since 1972.
And yea, outside of The Girl with the Dragon Tattoo Rooney Mara kind of sucks and I would rather look at her sister anyways.