Castiel is a distinctive boys' name in United States, ranking #821 in 2015 with 276 recorded births. This places Castiel in the top 6% of ranked US boys' names for the year. Its actual usage is classified as Uncommon. The name reached its all-time peak in 2019 with 336 births ranking #724. In 2015, approximately 1 in every 6,943 boys born was named Castiel. STABLE Recent data shows the name is currently stable.