Charles W. probably was never married.

The 1910 Illinois census, McDonough County, lists Charles W. Heinzman, age 46, both parents born in Illinois, and enumerated with Charles E. Alexander.

Heinzman, Chas W   View Image Online
  Age: 66
Year: 1930
  Birthplace: Illinois
Roll: T626_533
  Race: White
Page: 1A
  State: Illinois
ED: 28
  County: McDonough
Image: 0479
  Township: Prairie City
  Relationship: Head393