Calahan is a distinctive boys' name in United States, ranking #7389 in 1997 with 7 recorded births. The name reached its all-time peak in 2025 with 26 births ranking #4063. Since 1996, the popularity has decreased by 22.2%. In 1997, approximately 1 in every 269,299 boys born was named Calahan. RISING Recent data shows the name is currently rising.