Callaghan is a distinctive boys' name in United States, ranking #9467 in 1997 with 5 recorded births. The name reached its all-time peak in 2025 with 41 births ranking #3002. Since 1996, the popularity has decreased by 16.7%. In 1997, approximately 1 in every 377,018 boys born was named Callaghan. STABLE Recent data shows the name is currently stable.