@Ari Knobler
My paternal side left Suwalki for the USA in 1872 but I remember my great grandfather using that pronunciation.
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As for Yiddish being jargon, that is a polite word.
My Oma (maternal side came from Germany in 1868) called it a ‘gutter tongue’
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When I was in high school 54 years ago Yiddish was offered as one of 12 foreign languages. I signed up and took the first week of classes.
Zaidah asked me what I learned and I gave a few examples.
He said, your teacher is a Galitzianer, drop the class.