Hi Heather,
Not sure if you've found anything further on the Glab line since your 2001 post. Here's what I know.
Joseph Eugene Glab married Mary Kathleen Burke md 28 Nov 1944.
Joseph's parents were Maurice (sometimes Morris) Paul Glab and Mary Veronica Roth.
Maurice's parents were Johann ("John") Glab and Louisa Katherine Wagner md 7 Dec 1861 in Dubuque, Iowa.
Johann's parents were Christoph Glab & Elizabeth Jager ('a' in Jager has an umlaut in it).
I have additional info and a few generation or two more further back if you are still interested.