Braiden is a modern spelling variant of Braden, from Irish roots meaning 'broad' or 'salmon.'
Braiden is one of several spellings — alongside Braden, Brayden, and Braydon — of a name rooted in the ancient Irish surname Ó Bradáin, meaning "descendant of Bradán." Bradán is the Irish word for salmon, a fish of enormous spiritual significance in Celtic mythology. The Salmon of Knowledge, or An Bradán Feasa, appears in the legend of Fionn mac Cumhaill: a young Fionn burns his thumb while cooking the mythic salmon and tastes the burn, instantly absorbing all the world's wisdom.
The salmon was revered as a creature that swam between worlds — ocean and river, known and unknown — making it a symbol of insight, transformation, and earned wisdom. As a surname, Brady and its cognates were common across Ireland; as a given name, Braiden and its variants became a phenomenon in the late twentieth century. The name rode a massive wave of "surname-as-given-name" popularity in the English-speaking world during the 1990s and 2000s, peaking in the United States around 2012 before gradually relaxing.
Parents were drawn by its clean sound — two short syllables ending in the familiar "-den" — as well as its vaguely Celtic authenticity without requiring fluency in Irish naming conventions. The Braiden spelling, with its "ai" digraph, adds a slight visual flourish that distinguishes it from the more common Braden. It is part of a broader American pattern of using alternate vowel combinations to individualize a familiar sound, making each child's name technically their own even within a popular name cluster.