Ellicott's Commentary On The Whole Bible
1 Chronicles 2 - Introduction
II.
Dismissing the sons of Esau-Edom, the narrative proceeds with the sons of Israel, who are named in order, by way of introduction to their genealogies, which occupy 1 Chronicles 1-8.
The rest of 1 Chronicles 2 treats of [the leading tribe of Judah, and its sub-divisions, under the heads of Zerah and Perez (3-41), and Caleb (42-55); while 1 Chronicles 3:4 complete the account of this tribe, so far as the fragmentary materials at the writer’s disposal permitted.