Thank you very much for your insight. Most of the O'Brien's, and Neftelberg's. Still don't know or understand what happened many years ago and why the O'Brien's raised the Neftelberger Children. I can trace back to Nathan and Bertha Neftelberger which is Joseph Neftelberger's parents. Joseph married outside of the jewish faith and his wife died and the children where raised by O'Briens (Friend, Neighbors, Family..not sure no one knows). 8 children were split between 2 o'brien families. My g-grandfather changed his name from Joseph Neftelberger to Joseph O'Brien and Walter Neftelberger changed his name to Walter O'Brien. All other children changed to Neftelberg.
My generation of the family is all in wonder over the history of our family.