JaelfBiblical, Biblical Portuguese From the Hebrew name יָעֵל (Yaʿel) meaning "ibex, mountain goat". This name appears in the Old Testament belonging to the wife of Heber the Kenite. After Sisera, the captain of the Canaanite army, was defeated in battle by Deborah and Barak he took refuge in Heber's tent. When he fell asleep Jael killed him by hammering a tent peg into his head.