iacrisma…………
My maternal side is German-Jewish-American (arriving in NY 1868)
There is a big difference between Yekke and German
Not all German Jews are Yekkes (wearers of the short coats).
Most German-American Jews in Washington Heights (KAJ) are relative newcomers to America. My parents lived in NYC until 1950 and my mother said she never came across this phenomenon until moving to New Haven.
The German-Jewish Synagogue in New Haven (now in a suburb and not orthodox) was chartered by the State of Connecticut in 1840