I have a little info on some Schaabs in St. Louis, MO. They seem to be a part of our family, but we haven't figured it out yet! The info I have for them, taken off tombstones, is:
Frank L Schaab - b. 1866, d. 1961 husband
Theresa Schaab - b. 1870, d. 1936 wife
Frank J Schaab - b. 1903, d. 1969 (probably son of above couple)
Florence C Schaab - b. 1905, d. 1987 (probably wife of Frank J Schaab, they share a headstone)
Theresa Rinderer - 1896-1963. I am confused about her, she could possibly be a daughter of Frank L and Theresa.
All of these people are buried on the same lot in Calvary Cemetery in St. Louis, MO. There are people in our line with both of these surnames, but we don't know if any of them are living. I hope this helps you!