Calahan is a distinctive boys' name in United States, ranking #6527 in 2001 with 10 recorded births. The name reached its all-time peak in 2025 with 26 births ranking #4063. Since 1996, the popularity has increased by 11.1%. In 2001, approximately 1 in every 194,283 boys born was named Calahan. RISING Recent data shows the name is currently rising.