Yoav

Joab (Hebrew יוֹאָב‎ _ModernYo'av _Tiberian Yôʼāḇ) the son of Zeruiah, was the nephew of King David and the commander of his army, according to the Bible.

The name Joab (יוֹאָב‎) is derived from Yahweh (יהוה‎), the name of the God of Israel, and the Hebrew word 'av' (אָב‎), meaning 'father'. It therefore means 'Yahweh [is] father'. Apart from David's nephew, the name is given to two other individuals in the Bible (see Ezra 2:6, 8:9). Those are the descendants of Joab of Bethlehem the son of Zeruiah; the subject is of the house and head of the house. The individual is Obadiah the son of Jehiel. It is also a common name in modern Israel.

Joab was the son of Zeruiah, a sister of king David, who made him captain of his army (2 Samuel 8:16; 20:23; 1 Chronicles 11:6; 18:15; 27:34). He had two brothers, Abishai and Asahel. Asahel was killed by Abner in combat, for which Joab took revenge by murdering Abner in an ambush against David's wishes (2 Samuel 2:13-32; 3:27).

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