Litwinowicz is a Polish and a Belarusian surname derived from the word Litwin ("Lithuanian" or anyone from the Grand Duchy of Lithuania).
It is also spelled Litvinovič and Litvinovich, from Belarusian: Лiтвiновiч.
Surnames of similar etymology: Slavic: Litvin, Litvinchuk, Litvinov, Litwin, Litvak, Litovchenko; German: Litauer, Littauer.
Litwinowicz, Litvinovich, or Litvinovič may refer to: