My aunt Catherine Frank was married to August Haberkorn, whose family was from Kansas. There were about 9 siblings in my uncle's family. Several still live in the Denver metro area. Some of the names are John & Francis Haberkorn. John lives in Colo Springs, Francis in the Denver area. Two of the sisters are named Leona and Florene, also in the Denver area. My uncle, August, died in the late 70's. Also deceased is a brother, George, nicknamed doc. I believe another brother, Alfred has also passed.
I have met several Appelhans at weddings and funerals over the years, but do not recall their first names. One group had a polka band, in Denver I believe.
My cousin, Richard Haberkorn lives in Colorado Springs, and my aunt lives in northern California with her daughter Kay Ferguson. She is in her early 80's. Hope this helps. If you need help contacting this branch of the family, please let me know.