Hi, you may already have this information, but just in case....
Carl Henry's brother was Gustav Herman b 15 Oct 1889 and d 8 Feb 1968, his sister was Ellen b May 1886. Not sure who (if) she married.
Their parents were Henry Neubauer b 1852 (1858) d 1932 and Augusta Voll b 1859 d 1944. Henry's parents were Carl and Frederika (Blossi) and Augusta's parents were Carl and Johanna.
Most of the family is buried in the Hubbard Cemetery, Hardin County, Iowa. The tombstone information is posted at http://iagenweb.org/hardin/hcsitedata.htmhttp://iagenweb.org/hardin/hcsitedata.htm under Cemeteries.
There is also a group of Neubauers in the Alden, Hardin County, Iowa area. I am trying to connect the Alden and Hubbard Neubauers to my family -- Wilhelmine Henriette Neubauer (geb. Lawrenz). A daughter of Wilhlmine (Anna Frederkia) married Ludwig Oldenberg.