Calahan is a distinctive boys' name in United States, ranking #6194 in 2022 with 14 recorded births. This places Calahan in the top 43% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2025 with 26 births ranking #4063. Since 1996, the popularity has increased by 55.6%. In 2022, approximately 1 in every 124,598 boys born was named Calahan. RISING Recent data shows the name is currently rising.