Callaghan is a distinctive boys' name in United States, ranking #6613 in 1999 with 9 recorded births. The name reached its all-time peak in 2025 with 41 births ranking #3002. Since 1996, the popularity has increased by 50.0%. In 1999, approximately 1 in every 213,343 boys born was named Callaghan. STABLE Recent data shows the name is currently stable.