Calahan

Calahan is a masculine name of Irish origin, representing a variant spelling of Callahan or Callaghan. It derives from the Gaelic 'Ó Ceallacháin,' meaning 'descendant of Ceallachán,' a personal name stemming from 'ceallach,' meaning 'strife' or 'contention.' The surname Callahan was transformed into a given name following the common pattern of Irish surnames becoming first names in American naming traditions. Calahan offers a strong, distinctly Irish identity while its alternative spelling gives it a contemporary touch. While less common than Callahan, this variant maintains the same robust, traditional feel with its three-syllable rhythm. The name evokes images of Irish heritage and carries a certain dignified strength.

Pronounced KAL-uh-hun.

As of October 2026, Calahan ranked #4063 in US births in 2025 SSA.