Hello, Ken, I'm one of the descendants of Birnbaums, but not the Juda->Jeruchim->Jacob branch, but Juda->Dawid->Ester Ruhel branch, so Jacob was my step-grand-grand father (nephew of my 3*grand father, Juda being common ancestor). I'm also interested in any information about Birnbaum family and would like to meet other descendants to share any known information about them.