Callaghan is a distinctive boys' name in United States, ranking #8246 in 2014 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 2014, approximately 1 in every 213,382 boys born was named Callaghan. STABLE Recent data shows the name is currently stable.