Mary Ann's parents, John Rooney and Sarah Tracy, were double first cousins: Both their parents were siblings.
Mamie is the daughter of John J Rooney and Sarah Margaret Tracey. She is a sister to Johnny, Thomas, Mosie, Ella Elizabeth, Frances M, Catherine and Edmund A Rooney. Their father died in 1894 in Minnesota and brothers Johnny and Mosie died that year as well.
Mamie married John Walter O'Brien. They are the parents of John D, Helen F, George H, Irene, Ida, Charles, Julia, Raymond and Margaret. Mamie worked as a dressmaker.
Her mother was in care here in 1910 and died in 1911. Her brother, Edmund, was in care here from Dec 1924 until his death in 1931, so they were here at the same time. He, too, is buried here.
Mamie was admitted 6 yr 10 mo 14 days before her death of a strangulated ventral hernia.