Hi Laura, I was just googling different family names when I came across your post. I can fill in a little bit for you. During the same time period that your dad used to visit Elmer Einwechter (I'm now 61), Elmer (I called him "Uncle El") used to visit his sister(my maternal grandmother)in Brigantine, New Jersey. Her birth name was Ellie Einwechter, but she didn't like the name Ellie so she changed it to Helen. She married my maternal grandfather,William Starr,and they had two daughers, my mother Ruth Starr Neuterman and her sister Helen Starr Lynch(now age 91). Ruth had four kids,my brothers Mike and Bill and I and our half-sister Pat.
"Ellie" was born in 1894. Her parents were George Philip Einwechter and Ellen Hamilton Einwechter. I remember her mentioning that she also had a brother George and a sister named Edith. I think there were more siblings, but I don't remember for sure. Her brother Elmer had a son named Raymond Einwechter, who married Terry (don't know her maiden name). They had a son, Raymond Jr. and daughters Terry, Sue, and Kathy. Raymond Jr (R.J.)still lives in Philadelphia.
Anecdotal info from my grandmother: She said that her father, George Philip Einwechter, was a Philadelphia architect and that he constructed a mint in Phildelphia; also, that there was some distant relationship in the family to Alexander Hamilton; also, that there was a Martha or Mary Hamilton, a Quaker, who participated in the underground railroad, allowing escaped slaves to stay at her place in Pennsyvania as they fled to safety. I have no way of knowing if these accounts are accurate, but she definitely believed them. Take care, (Lewis)Wayne Neuterman