My father, Thomas William Kasprzak, b. 7 May 1927 in Chicago, IL d. 1996, was adopted at birth by the Thomas William Kasprzak Sr. family. The name on his original birth certificate was Eugene Vincent Ebel and it claimed a Eugene Ebel was the father. However, this was a fictitious name as Ebel was the maiden name of his maternal grandmother, Vincenzie Ebel Soustek. The birth mother was Antoinette Soustek b. 22 Jan 1910 d. 1985 and she falsely claimed to be married to a Eugene Ebel.
My research has found only one Decker man whose family claims descent from JBD, that was living in the right place, right time. However, Y-DNA testing of this man's legitimate son reveals that he was NOT a descendant of JBD (or his son wasn't).
I realize that the surname of my paternal gf might not even have been Decker, even though he was a direct paternal descendant of JBD. Anyone who might have known who the father was is deceased and Antoinette fabricated tales about him.
I have a huge xlsx file of FF matches on the paternal side but haven't had the courage yet to try and make mirror trees of these matches. So, other than that, if anyone has a Decker ancestor in their tree who may be a candidate please let me know.