Tadija (Serbian Cyrillic: Тадија) is a Serbian masculine given name, derived from the Greek name Thaddaios. Notable people with the name include: Tadija Dragićević (born 1986), Serbian basketball player Tadija Kačar (born 1956), Serbian boxer Tadija Smičiklas (1843–1914), Croatian historian and politician Tadija Sondermajer (1892–1967), Serbian and Yugoslav Royal Air Force Reserve Colonel Tadija Tadić (born 1999), Serbian basketball player