Concerning the name of Jacob:
I looked at the death certificate of Bertha Boldt who died on February 12, 1920. The information that was given was:
Born in Germany
Father Jacob Dansic or Donsic, born Germany;
Mother Unknown also born in Germany;
Buried in Union Cemetery at Woodlawn, IL.
However I don't see that cemetery listed in JCI.
You can order directly from the County Clerk by sending a SASE and a check or money order in the amount of $10.00.