Hmmmmm. We may have to retrace this line. I found a passport application for Carl Bieber in 1924 that lists his father as Adam. Adam had a sister Caroline who married Henri Graff. They came to Buffalo before 1900. He also lists his sister-in-law's name on the application. If you find anything new send me a message at firstname.lastname@example.org
. I will do the same. Send me your e-mail address.