The sons of Judah were Er and Onan: and Er and Onan died in the land of Canaan.
Er and Onan - (see the notes at Genesis 38:3-4.) Died in the land of Canaan (Genesis 38:7; Genesis 38:10; Genesis 46:12.)
The sons of Judah after their families ... Shelah [Septuagint, Seeloom] - (see the notes at 1 Chronicles 4:21-23).
Pharez - [Septuagint, Fares.]
Zerah, [Septuagint, Zara] - twin brothers of the former.