Jael
Jael or Yael (Hebrew Ya'el, יָעֵל, meaning Ibex) is a woman mentioned in the Book of Judges in the Bible, as the heroine who killed Sisera to deliver Israel from the troops of King Jabin.
Family
All that the bible says is that Jael was the wife of Heber the Kenite. The Kenites were a clan or small people, originally nomadic, who were not Israelites, but some of whom lived in close proximity with the Israelites. The bible records a number of cases of intermarriage; the (or a) father-in-law of Moses was apparently a Kenite, but it is not clear if this was Jethro. The Kenites may have been a part of the Midianite grouping.
Jael in the book of Judges
God told Deborah (a prophetess and leader) that she would deliver Israel from Jabin. Deborah called Barak to make up an army to lead into battle against Jabin on the plain of Esdraelon. But Barak demanded that Deborah would accompany him into the battle. Deborah agreed but prophesied that the honour of the killing of the other army's captain would be given to a woman. Jabin's army was led by Sisera (Judg. 4:2), who fled the battle after all was lost.