Callaghan is a distinctive boys' name in United States, ranking #5137 in 2018 with 18 recorded births. This places Callaghan in the top 36% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2025 with 41 births ranking #3002. Since 1996, the popularity has increased by 200.0%. In 2018, approximately 1 in every 100,860 boys born was named Callaghan. STABLE Recent data shows the name is currently stable.