Castiel is a distinctive boys' name in England & Wales, ranking #2133 in 2025 with 11 recorded births. This places Castiel in the top 35% of ranked UK boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2014 with 22 births ranking #1178. In 2025, approximately 1 in every 24,721 boys born was named Castiel. FALLING Recent data shows the name is currently falling.