I don't know if this is relevant, but my grandfather and his second wife are buried in Oak Woods Cemetery, along with their daughter (who would have been my father's half-sister), who died at age 8.
This is ironic, because my genealogical snooping uncovered that they went through a nasty divorce (finalized three months before the daughter died). My grandmother, who was Wife #3, paid for the plot. She outlived my grandfather by 30 years, so must have decided to have him placed with his daughter.
My father grew up in Oak Park, and I have his senior yearbook
.