Zeitlin () 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, Tzeitlin. Female forms (usually only for Slavic nationals): Tseytlina, Tseitlina, Tsetlina, Tzeitlina.
When transliterated via Polish, the surname may be spelled as Cejtlin, Cajtlin, Zejtlin, Zajtlin.
The surname may refer to: Aaron Zeitlin (1889/1896/1898–1973), Russian-US Yiddish writer, composer, and poet Alexandre Zeitlin (1872–1946), sculptor Benh Zeitlin (born 1982), US filmmaker Denny Zeitlin (born 1938), US jazz pianist Froma Zeitlin (born 1933), US classics scholar Harriet Zeitlin (born 1929), American artist Hillel Zeitlin (1871–1942), Polish Yiddish writer Jacob Zeitlin (1902–1987), American bookseller and poet Joshua Zeitlin (1742–1822), Shklov-born Russian-Jewish rabbinical scholar and philanthropist Joshua ben Aaron Zeitlin (1823–1888), Kiev-born Russian-Jewish scholar and philanthropist Judith T. Zeitlin (born 1958), American-Jewish scholar of Chinese literature, chair of the Department of East Asian Languages & Civilizations at the University of Chicago Lev Tseitlin (1881-1952), a violinist and teacher Leo Zeitlin (1884–1930), a violinist, violist, conductor and impresario Mark Tseitlin (1943–2022), a Russian-Israeli chess grandmaster Michael Lvovitch Tsetlin (1924–1966), Russian mathematician and physicist Mikhail Tseitlin (born 1947), Belarusian chess grandmaster Mirah Yom Tov Zeitlyn (born 1974), American musician Michail Yulyevich Tseytlin (Михаил Ю́льевич Цейтлин), also as M. Yu. Ceitlin and M. Ju. Zeitlin, a Russian mathematician, who worked on the book Gradshteyn and Ryzhik in the 1960s and early 1970s Solomon Zeitlin (1892–1976), American Jewish historian William Zeitlin (1850–1921), Russian-Jewish scholar and bibliographer Zvi Zeitlin (1922–2012), Russian-US violinist Arkady Tseytlin (born 1956), Russian-British theoretical physicist Vladislav Tseytlin (born 1971), Uzbekistani football FIFA referee Anna Tseytlin (born 1976), of Jewish and Ukrainian descent. Active American Immigration Attorney Michael Tseytlin (born 1964), Russian-US Entrepreneur, executive and inventor