קוזמיר
'Kazimierz Dolny (town in eastern Poland)'

ETYMOLOGY

Beider suggests that the name was borrowed from Old Polish, before the 16th c., when the first vowel of Kazimierz was long /aː/ (perhaps the vowel was lengthened in a stressed syllable before two consonants of which the first is a sibilant). The vowel merged with A₂ and had the corresponding different realizations in Yiddish dialects (e.g., "Kuzmir" in CY).

KU:ZMER [Yiddishland, Paul Glasser]