Bronstein is the surname of:
Lev Davidovich Bronstein (Leon Trotsky) (1879–1940)
David Bronstein (1924–2006), Ukrainian chess grandmaster
Hila Bronstein (born 1983), German singer/songwriter
Martin Bronstein, Canadian actor
Matvei Bronstein (1906–1938), Soviet theoretical physicist
Olga Kameneva (née Bronstein) (1881–1941), sister of Leon Trotsky
Phil Bronstein, editor of the San Francisco Chronicle
Raphael Bronstein (1895–1988), Noted violin performer and teacher