I may have some relevant info. An obit in "The True Voice" the RC diocese paper dated July 6, 1928 states that Catherine Breen died in Omaha and was buried in Denison Ia. Vail cemetery. Born Co. Galway Sept 14, 1847 came to US with parents at age 5. Married Patrick Breen March 1888 at Winona Illinois. My notes do not include the names of the children but they were named in the obit. If this is revelant will get the actual obit.
Would guess this is second marriage because of age when she married Patrick.