I'm Elinor Mintz's granddaughter. When I was younger, I interviewed my grandmother for a family tree project in school. One of the questions was about whether or not the family's original surname had been anglicized. My grandmother shared with me that in fact, Mintz was not her family's original surname-- it was the name of the business-owners her immigrant ancestors worked for. Apparently the Mintz family showed them great kindness, so my grandmother's ancestors (and your ancestors, in turn) changed their surname to Mintz.
Does anyone know is this is true? I'll be seeing my grandmother this coming Sunday and will ask her. If it is true, that may change the family tree significantly.
Your grandmother is absolutely correct. The family surname was Sandler. There was one branch of the family that emigrated from Lithuania to South Africa and they remain Sandlers to this day. I would be very happy to invite you to the large Mintz tree that we have on Geni. If you tell me which one of Elinor's sons is your father, I can link you in.
BTW, I remember your grandfather. In October 1965, when I was eleven years old, my cousin Steven Abrams (different side of the family) came down with pneumonia the week before his bar mitzvah. So his parents cancelled the bar mitzvah in shul, but your grandfather brought the torah over to my cousin's house, and our family celebrated his bar mitzvah by conducting the service in his living room. When it came time to read torah Steven came down from his room in his bar mitzvah suit, read his parshah with aliyot for his closest relations, and then went back to bed. It was a memorable day, handled most elegantly and sensitively! :)
I noticed that you invited your father today, which is great, but he appears to have started a new tree rather than joined our existing one. This can create real problems. What I recommend is that he accept our invitation to join the tree using the exact same email address that he used to create his tree on his own. That will allow him to automatically merge his two profiles. Then he should delete the new profile that he created for his father and all will be right with the world....