Illustrious, noble, or descendant of Ghráda
Gradyn is a modern American variation of the Irish surname Grady. It stems from the Gaelic name Ó Grádaigh, which is derived from the word 'grádach', meaning noble or illustrious. The 'y' spelling is a contemporary stylistic choice often seen in 21st-century naming trends.
About 7 boys were named Gradyn in 2025.
US births per 5-year period, 1990–present (SSA data).