Mary Lou Niehaus (nee Gavin), beloved wife of 64 years to the late Edward J. Niehaus. Devoted mother of Tom (Emily) Niehaus, Carol (Harry) Kunstman, Dan (Nancy) Niehaus, Steve (Terri) Niehaus, Dave (JoAnn) Niehaus, Ed (Beth) Niehaus, Ann (Kevin) James and Karen (Donnie) Bush. Loving grandmother of 20 grandchildren and 51 great grandchildren. Preceded in death by her siblings Tom, Jack, Betty, Jim and Dorothy Ann. Mary Lou passed away on Monday, October 23, 2023 at the age of 96. Visitation at Frederick Funeral Home, 2553 Banning Road on Thursday (October 26) from 5:30pm-7:30pm. Mass of Christian Burial at St. Lawrence Church, 3680 Warsaw Ave. on Friday (October 27) at 10am. Memorials may be made to St. Joseph Home, 10722 Wyscarver Road Cincinnati, Ohio 45241 . Special condolences may be expressed at frederickfh.com