I had Silbermans/Zilbermans in my family from what is now Moldova but was Romania between the world wars. That was their name before emigration. They were jewelers and silversmiths, and I think that’s where the name came from. So I wouldn’t rule out the name as being original.
SHUKHAT (Talnoe, Simferopol, Sevastopol, Odessa, Balta (Abazovka), Pogrebishche)
VINOKUR (Talnoe), KURIS (Mogilev-Podolskiy, Ataki, Berdichev)
ZILBERMAN (Soroki, Kremenets), BIRNBAUM (Kamenets-Podolskiy)