Concordancia Strong's

A man living at the time of United Monarchy, first mentioned at 1Sa.26.6; his mother was Zeruiah (H6870);
brother of: Abishai (H0052) and Asahel (H6214)
§ Joab = "Jehovah is father"
1) son of David's sister Zeruiah and general of David's army
2) a Judaite descendant of Kenaz
3) a post exilic family A man of the tribe of Judah living at the time of Divided Monarchy, only mentioned at 1Ch.4.14;
son of: Seraiah (H8304J)
§ Joab = "Jehovah is father"
1) son of David's sister Zeruiah and general of David's army
2) a Judaite descendant of Kenaz
3) a post exilic family A man living at the time of Exile and Return, first mentioned at Ezr.2.6;
son of: Pahath-moab (H6355);
brother of: Jeshua (H3442I)
§ Joab = "Jehovah is father"
1) son of David's sister Zeruiah and general of David's army
2) a Judaite descendant of Kenaz
3) a post exilic family A man living at the time of Exile and Return, only mentioned at Ezr.8.9
§ Joab = "Jehovah is father"
1) son of David's sister Zeruiah and general of David's army
2) a Judaite descendant of Kenaz
3) a post exilic family