Is it possible that Suzanna & mother died at child birth or shortly after.
I located a Cincinnati Health Department Death Record for Susannah TENOEVER, 4 years old, died 5 Jun 1874. Does not list the parents but it very well could be Herman & Anna Mary's child, named after the Suzanna in the Netherlands?? A four year old would have been born after the 1870 US Census.
The 1910 US Census lists Mary TENOEVER as having 6 children with 3 living. I have to account for 2 more children for Herman & Mary. Susannah may be one of them.