Kallahan is a distinctive boys' name in United States, ranking #6002 in 2022 with 15 recorded births. This places Kallahan in the top 42% 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 38 births ranking #3163. In 2022, approximately 1 in every 116,292 boys born was named Kallahan. RISING Recent data shows the name is currently rising.