From Irish surname Ó Brádaigh, meaning spirited or broad-chested.
Brady began as an Irish surname, usually traced to the Gaelic Ó Brádaigh or Mac Brádaigh, meaning "descendant of Brádach." The old personal name Brádach has been interpreted in different ways, often as "spirited" or "broad," which gives Brady a sturdy, lively quality. Like many surnames from Ireland, it traveled through migration and gradually crossed over into first-name use, especially in the English-speaking world where surname-names became fashionable markers of family heritage and clean, informal style.
As a given name, Brady took off in the late twentieth century. Part of its rise came from the general popularity of Irish names, and part from cultural familiarity: Americans in particular had already absorbed the surname through The Brady Bunch, which made it sound warm, recognizable, and distinctly domestic. Later, public figures such as athlete Tom Brady reinforced the name’s sporty, competitive image, even though the original surname is much older than any modern celebrity association.
What makes Brady interesting is its shift in tone over time. It once read primarily as an Irish family name; now it feels brisk, approachable, and all-American, with a preppy edge. Yet underneath that modern polish is a classic migration story, one shared by many Irish surnames that became first names. Brady manages to sound friendly and contemporary while still carrying the weight of clan identity, diaspora, and the long afterlife of Gaelic naming traditions.