A variant of Kerrigan/Carrigan, from an Irish surname often connected with 'descendant of Ciaragán.'
Karrigan is a creative variant of the Irish surname Kerrigan, which derives from the Old Irish 'Ciarragáin,' a diminutive of 'ciar,' meaning dark or black — originally likely referring to dark complexion or hair, a common descriptive root in Gaelic personal names. The Kerrigan sept was historically associated with County Mayo and County Roscommon in western Ireland, where the name appears in medieval records. The modernized spelling Karrigan shifts the name's center of gravity from surname to given name, giving it a fresher, more individually oriented identity.
The name entered broader American consciousness partly through the world of competitive esports: Karrigan (born Finn Andersen) is the professional name of one of the most respected CS:GO captains in the history of the game, a Danish player known for his tactical intelligence and composed leadership. This particular bearer gave the name an unexpected contemporary profile among younger audiences and gaming communities, a 21st-century route to cultural visibility that has nothing to do with its Irish origins. As a given name, Karrigan benefits from the same phonetic energy that has made names like Keegan, Brennan, and Callahan popular well outside Irish-American communities.
The double-r gives it a slightly more emphatic visual presence than Kerrigan, and the '-an' ending keeps it feeling open and modern rather than stiffly traditional. It is a name that honors an old root while growing into something new.