Callaghan is a distinctive boys' name in United States, ranking #12575 in 2011 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 2011, approximately 1 in every 379,798 boys born was named Callaghan. STABLE Recent data shows the name is currently stable.