Grady is an Irish surname, the anglicized form of Ó Grádaigh, meaning "descendant of Grádach", a byname usually explained as "noble" or "illustrious". It has a friendly, old-fashioned American feel and belongs to the same family as Brady and Grayson. Grady rose from number 746 in 2000 to a peak of number 286 in 2008 and ranks number 373 in 2025.