Antanavičius is a Lithuanian language family name. The surname may refer to: Kazimieras Antanavičius (several persons) Kazimieras Antanavičius (officer), partisan in the military of Lithuania, recipient of the Order of the Cross of Vytis Kazimieras Antanavičius (economist) (1937–1998), signatory of the Act of the Re-Establishment of the State of Lithuania in 1990 Valentinas Antanavičius (1936–2024), Lithuanian painter
Related surnames Antonowicz, Polish Antonovich, Russian Antonović, Serbian Antonovych, Ukrainian