A variant of Keegan, from an Irish surname meaning descendant of Aodhagan, little fiery one.
Keigan is a variant spelling of Keegan, a name with deep Irish Gaelic roots. It derives from the surname Mac Aodhagáin, meaning 'son of Aodhagán,' itself a diminutive of Aodh — the ancient Celtic god of fire and the sun. Aodh was one of the most venerated deities in the pre-Christian Gaelic world, and names branching from this root carry an ember of that mythological warmth.
The anglicization of Gaelic names during centuries of British rule transformed Mac Aodhagáin into the more pronounceable Keegan, and later into the phonetic variants Keigan and Kegan. As a given name in the English-speaking world, Keegan surged in popularity during the late twentieth century, riding a broader wave of Irish surname-names being adopted as first names. The spelling Keigan emerged as parents sought to individualize the sound — giving the name a slightly more visual distinctiveness without straying from its phonetic identity.
It carries the rugged, open-vowel energy common to Celtic names. Today Keigan occupies a space between tradition and modernity. It is uncommon enough to feel distinctive but rooted enough to feel grounded.
The name appeals to families with Irish heritage seeking to honor that lineage, as well as those drawn simply to its sound — strong, two-syllable, and energetic. Its fire-god ancestry lends it an unspoken vitality that has made Celtic names perennially appealing across the English-speaking world.