Sorry I didn't respond sooner.I haven't checked the forum for a while.
I don't have a lot of info. on the Kantz's beyond my own direct line so I'm not sure of the connection between your line and mine.
However, I was just to Elkhart for a funeral and happened upon the marker for your Hiram and Cassandra.I took a picture of it along with many other Kantz's (including mine)on the hopes I would find the connection later.
Then I get home and read you message.I just looked at the photos again and noticed a McCreary marker in the background and another for a daughter of Henry and Anna.
Most of my Kantz's were there so there must be a connection somewhere.I'm working on this line currently so I'll let you know when I find something.