Little champion or spear
Carigan is a rare variant of the Irish surname Carrigan, which is an anglicized form of Γ CorragΓ‘in. It is derived from the Gaelic word 'corra' meaning spear, or 'coirre' meaning champion, combined with a diminutive suffix. In modern usage, it is often chosen for its rhythmic similarity to names like Reagan or Madigan.
Less common today
Carigan isn't in the latest US Top 1000. It last peaked at #8,117 in 1996.
US births per 5-year period, 1990βpresent (SSA data).