1) Russian surname 
Zeitlin (צייטלין) is a matronymic Jewish surname. It is derived from the female name Zeitl according to the rules of Slavic languages, with the possessive suffix `-in` and literally means `Zeitl`s`. When transliterated from Yiddish to Russian to English, the surname may be spelled as follows. Male forms: Tseytlin, Tseitlin, Tsetlin, Tz...