Rising since 1990, #227 for boys today.
Popularity of Callahan since 1983
Babies named Callahan per year in U.S. Social Security records.
Data table (by decade)
| Decade | Girls | Boys |
|---|---|---|
| 1980s | 12 | 52 |
| 1990s | 115 | 154 |
| 2000s | 166 | 347 |
| 2010s | 273 | 1,069 |
| 2020s | 435 | 4,408 |
Meaning & origin
Callahan first entered the U.S. naming charts in 1983, and has risen steadily in popularity since 1990, reflecting the broader trend of Irish surname-names for boys. In 2025 it reached a new peak rank of 227, with a frequency of 1 in 1,091 births that year, making it a solid, moderately common choice. The name is most concentrated in the states of Montana, New Hampshire, and South Dakota, suggesting particular appeal in the northern and western United States. Its trajectory shows consistent growth over three decades, with no signs of fading, as it benefits from its strong Irish heritage and the approachable nickname Cal.
Callahan is an anglicized form of the Irish surname Ó Ceallacháin, meaning 'descendant of Ceallachán'. The personal name Ceallachán is a diminutive of Ceallach, which may mean 'bright-headed' or 'strife', though its exact meaning is debated. The surname originated in County Cork, Ireland, where it has been prominent since the Middle Ages. As a given name, Callahan began appearing in the United States in the late 20th century, inspired by the surname trend.
Where Callahan is most popular
Births per 100,000 boys by state. Press play or drag the slider to watch it move across the decades. The lightest shade means too few recorded births.
Nicknames & variants
Nicknames: Cal
Variants: Callaghan, O'Callaghan
Sibling names for Callahan
Names that share Callahan's style, for a brother or sister.
