Martin Brennan may refer to: Martin Brennan (Irish politician) (1903–1967), Irish medical practitioner and Fianna Fáil politician, TD from 1938 to 1948 Martin Brennan (engineer), computer engineer who worked for Sinclair Research and Atari Martin A. Brennan (1879–1941), U.S. Representative from Illinois Martin Brennan (hurler) (born 1946), Irish retired sportsperson Martin Stanislaus Brennan (1845–1927), American Roman Catholic priest and scientist Martin Brennan (footballer) (born 1982), English footballer