I have the 1936 death record (MN, Ramsey, St Paul) for a Barbara Henry, Husband Constantine Henry (Henrich). Her parents are listed as Farnk Cech (Austria) and Mary Brabec (Austria). Age 88 at death, she could be a sister to your Kathryn. Also, she is buried at Oakland Cem in St Paul, MN and there are 2 Zimmerman's also buried in the same lot and block (23, 62). They are Laura E. Zimmerman, died 16-Aug-1946, age 77 and her Husband, Edward F. Zimmerman, died 21-Dec-1951, age 84.