For Marcella Cordes, the MN Historical Society record:
Name: Cordes, Marcella
Death Certificate Index | Text | 1969-MN-028721
Death: November 30, 1969
County of Death: Hennepin County, Minnesota, United States
Mother's Maiden Name: MEYER, Date of Birth: Apr 8 1918, Place of Birth: OUT OF STATE
Mother's maiden name matches.
Marcella's birth date is different on this record than what is on the Ancestry tree (which had no prof of date anyway).