Asahel (Hebrew: עשהאל, Greek: ‘Ασαέλ) (also known as Asael, Asaell, and Assael) was the youngest son of Zeruiah, step-daughter of Jesse, daughter of Nahash (which can be inferred from 2 Samuel 17:25). The name means "made by God." Asahel was the nephew of King David, as well as the younger brother of both Joab, David's general, and of Abishai. Asahel is mentioned in 2 Samuel Chapters 2 and 3.
Additionally, the name Asahel (under a variant spelling) appears in Aramaic in the Book of Enoch.