Calahan is a distinctive boys' name in United States, ranking #7169 in 2007 with 11 recorded births. The name reached its all-time peak in 2025 with 26 births ranking #4063. Since 1996, the popularity has increased by 22.2%. In 2007, approximately 1 in every 188,658 boys born was named Calahan. RISING Recent data shows the name is currently rising.