Brady is a surname derived from the Irish surname Ó Brádaigh or Mac Brádaigh, meaning "spirited; broad".
In a listing by the U.S. Census Bureau of the Most Common U.S. Surnames, Brady was ranked at #411 in 2014.[1]
The surname was used as a test of nominative determinism in a humorous 2013 article in the British Medical Journal.[2][3]