Jeff,

"Khaidenev" (Koidenav in Yiddish) = Dzyarzhynsk, Belarus

See:
https://kehilalinks.jewishgen.org/dzyarzhynsk/overview.html
"Traditional/Orthodox Chevrah Anshe Sholom Koidonov (1920-5) at 33 Jefferson Street "

Good luck in your search,

Sherri Bobish