Jacob
noun
Ja·cob ˈjā-kəb 
1
in the Bible : a son of Isaac and Rebekah, the twin brother of Esau, and heir of God's promise of blessing to Abraham
2
: the ancient Hebrew nation
Word History
Etymology
Late Latin, from Greek Iacōb, from Hebrew Yaʽăqōbh
First Known Use
before the 12th century, in the meaning defined at sense 1