Little bald one
Derived from the Irish surname Ó Ceallacháin, it is a diminutive form of the name Ceallach. While the literal meaning refers to being bald or disc-headed, it is historically associated with the powerful Eóganachta clan in Munster. In a modern context, it is often chosen for its rhythmic, three-syllable surname appeal.
Less common today
Calahan isn't in the latest US Top 1000. It last peaked at #4,087 in 2025.
American actor known for the series Shadow and Bone
US births per 5-year period, 1990–present (SSA data).
