US Popularity Rank: 862

Origin: Irish

Meaning: Bright-headed; Strife, contention

Callahan is a boy's name of Irish origin which has many meanings including "bright-headed," "strife," or "contention." It is a derivative of the Gaelic surname Ó Ceallacháin and may also be spelled as Callaghan. In the 10th century, Ó Ceallacháin was the king of the Munster province in Ireland. If you want to honor your ancestral heritage or give baby a name fit for a king, Callahan is a noteworthy contender.