If this is the same Sylvia, then the following data would apply from the SSDI:
Sylvia ROZHON
Birth Date: 1 Jan 1895
Death Date: Jun 1975
Social Security Number: 346-03-7175
State or Territory Where Number Was Issued: Illinois
Death Residence Localities ZIP Code: 73110 Localities: Midwest City, Oklahoma, Oklahoma Oklahoma City, Oklahoma, Oklahoma

OBIT:
1945-02-24 Chicago Tribune (IL)
GARDNER
Edition: Chicago Tribune
Marie Gardner, nee Chenicek, 2345 S. Central Park avenue, beloved mother of Frank, Edward, James, Joseph, Marie Szykowny, Sylvia Rozhon, Agnes Feldmeier, Rose Hallis, Alice Alcott, and Beatrice Hoster. Funeral Monday, 9 a.m., from chapel, 2658 S. Central Park avenue, to Blessed Agnes church. Interment St. Adalbert's cemetery. Lawn., 3101.

1. 1. Sylvia GARDNER
2. Marie GARDNER
3. Joseph GARDNER d. Jan 1942, Chicago, Cook, Illinois, USA.