Castiel is a name of biblical origin that means "angel of the Lord" in Hebrew. This name has gained popularity in recent years due to the character Castiel in the hit TV show "Supernatural." Castiel is portrayed as a powerful and loyal angel who helps the Winchester brothers in their battles against supernatural forces. The name Castiel exudes a sense of strength, protection, and divine guidance. It is a unique and intriguing choice for parents looking for a name with spiritual significance.