Biography of Achar

1 Chronicles 2

1 These are the sons of Israel; Reuben, Simeon, Levi, and Judah, Issachar, and Zebulun...

6 And the sons of Zerah; Zimri, and Ethan, and Heman, and Calcol, and Dara: five of them in all.

7 And the sons of Carmi; Achar, the troubler of Israel, who transgressed in the thing accursed.

8 And the sons of Ethan; Azariah.

Joshua 7

1 But the sons of Israel acted unfaithfully in regard to the things under the ban, for Achan, the son of Carmi, the son of Zabdi, the son of Zerah, from the tribe of Judah, took some of the things under the ban, therefore the anger of the LORD burned against the sons of Israel.

We follow the tradition of identifying Zabdi and Zimri and Achar and Achan in the above passages.