Sheralyn, Could not find either Szakacs or Stangler at Union Cemetery. I did find the following:
This could possibly be related.
Oakwood Cemetery, Waukegan, Lake County, Illinois
SACKAS, Baby d/bur. 8 Sep 1911 Block T Lot 33, 2nd gr from E line in 2nd row from S line
St. Mary’s Catholic Cemetery, Waukegan, Lake County, Illinois
SACZAK, Joseph d. 5 Oct 1910 aged 35 years, resident of North Chicago [no burial location given]
Records can be found at Ascension Cemetery, Libertyville, Lake County, Illinois
St. Mary's Cemetery records are not complete so it is possible the other family members are also buried there. Or they possibly were buried at Mt. Olivet Catholic Cemetery, Waukegan, Illinois [closed in 1958] which no longer exists. Those interred were removed to St. Mary's in Waukegan or Ascension Cemetery in Libertyville, Illinois. Hope this helps in your search. Ann