Calahan is a distinctive boys' name in United States, ranking #12366 in 2015 with 5 recorded births. The name reached its all-time peak in 2025 with 26 births ranking #4063. Since 1996, the popularity has decreased by 44.4%. In 2015, approximately 1 in every 383,252 boys born was named Calahan. RISING Recent data shows the name is currently rising.