1 Chronicles 2:3

3 The sons of Judah were Er, Onan, and Shelah; these three were born to him of Shua, a daughter of Canaan. And Er, the first begotten (son) of Judah, was evil before the Lord, and the Lord killed him. (The sons of Judah were Er, Onan, and Shelah; these three were born to him of the daughter of Shua, of Canaan/these three were born to him of Bathshua, a Canaanite. And Er, the first-born son of Judah, was evil before the Lord, and the Lord killed him.)

1 Chronicles 2:3 Meaning and Commentary

1 Chronicles 2:3

The sons of Judah
The genealogy begins with him, though the fourth son of Jacob; because, as Kimchi says, this book treats chiefly of the kings of Judah; but rather not only because Jesse and David sprang from him, but also the King Messiah:

Er, and Onan, and Shelah, which three were born unto him of the
daughter of Shua the Canaanitess;
see ( Genesis 38:2 Genesis 38:12 ) ,

and Er, the firstborn of Judah, was evil in the sight of the Lord;
because he did that which was evil:

and he slew him;
he died by the immediate hand of God, and so his brother Onan, being wicked also, ( Genesis 38:7 Genesis 38:10 ) .

1 Chronicles 2:3 In-Context

1 Forsooth the sons of Israel were Reuben, Simeon, Levi, Judah, Issachar, and Zebulun,

2 Dan, Joseph, and Benjamin, Naphtali, Gad, and Asher.

3 The sons of Judah were Er, Onan, and Shelah; these three were born to him of Shua, a daughter of Canaan. And Er, the first begotten (son) of Judah, was evil before the Lord, and the Lord killed him. (The sons of Judah were Er, Onan, and Shelah; these three were born to him of the daughter of Shua, of Canaan/these three were born to him of Bathshua, a Canaanite. And Er, the first-born son of Judah, was evil before the Lord, and the Lord killed him.)

4 And Tamar, the wife of the son of Judah, childed to him Pharez, and Zerah (bare him Perez, and Zerah); and all the sons of Judah were five.

5 And the sons of Pharez were Hezron, and Hamul. (And the sons of Perez were Hezron, and Hamul.)