Ann was born about 1930. She passed away about 1980.
Birth Certificate for Norman R. Knight shows mothers name as Ann Knight (Formerly O'Mahony) https://www.ancestry.com/mediaui-viewer/collection/1030/tree/50766009/person/13102049593/media/4dece291-d687-4a1c-ba0f-177fb5283e5e?_phsrc=f722105727&usePUBJs=true