Found this listing for Helen Charvat in Ontario CA:
http://www.peoplefinders.com/d/Helen+Charvat/1-307453174
It lists relatives: John A Charvat
Found this on ancestry:
Social Security Death Index
Name: John A. Charvat
SSN: *advertiser censored*
Last Residence: 91762 Ontario, San Bernardino, California, United States of America
Born: 9 May 1911
Died: 15 Nov 1993
State (Year) SSN issued: Illinois (Before 1951)
California, Death Index, 1940-1997
Name: John Anthony Charvat
Social Security #:*advertiser censored*
Gender: Male
Birth Date: 9 May 1911
Birth Place: Other Country
Death Date: 22 Nov 1993
Death Place: San Bernardino
U.S., Department of Veterans Affairs BIRLS Death File, 1850-2010
Name: John Charvat
Gender: Male
Birth Date: 9 May 1911
Death Date: 22 Nov 1993
SSN: *advertiser censored*
Branch 1: ARMY
Enlistment Date 1: 8 Feb 1944
Release Date 1: 6 Oct 1945