Caisyn is a distinctive boys' name in United States, ranking #9873 in 2025 with 7 recorded births. This places Caisyn in the bottom 29% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2023 with 31 births ranking #3635. In 2025, approximately 1 in every 244,011 boys born was named Caisyn. FALLING Recent data shows the name is currently falling.