There seems to be a bunch of Kunz men living in and around Newark, Orange/West Orange in the late 1800's, early 1900's. My great-great grandfather, Gottfried, was born in Germany. He arrived in NY in 1867.I don't have any information on Gottfried's siblings.
Gottfried's son, my great-grandfather, Friedrich was born in 1869. The only siblings I have been able to find are Male (died at less than a year old), Gustave (1873-1941), Henry (b. abt 1876), Rose (b. abt 1878), Katherine (b/d 1880 at 3 mos old), and William (1881-1943).
I have not been able to connect them to a Charles Kunz.