Numbers 26:19

Sons of Judah are Er and Onan; and Er dieth -- Onan also -- in the land of Canaan.

Genesis 46:12

And sons of Judah: Er, and Onan, and Shelah, and Pharez, and Zarah, (and Er and Onan die in the land of Canaan.) And sons of Pharez are Hezron and Hamul.

Genesis 38:1-10

And it cometh to pass, at that time, that Judah goeth down from his brethren, and turneth aside unto a man, an Adullamite, whose name is Hirah;

1 Chronicles 2:3-8

Sons of Judah: Er, and Onan, and Shelah, three have been born to him of a daughter of Shua the Canaanitess. And Er, first-born of Judah, is evil in the eyes of Jehovah, and He putteth him to death.

Treasury of Scripture Knowledge

Summary

The sons of Judah were Er and Onan: and Er and Onan died in the land of Canaan.

General references

Bible References

Er and onan

Genesis 38:1
And it cometh to pass, at that time, that Judah goeth down from his brethren, and turneth aside unto a man, an Adullamite, whose name is Hirah;
Genesis 46:12
And sons of Judah: Er, and Onan, and Shelah, and Pharez, and Zarah, (and Er and Onan die in the land of Canaan.) And sons of Pharez are Hezron and Hamul.
1 Chronicles 2:3
Sons of Judah: Er, and Onan, and Shelah, three have been born to him of a daughter of Shua the Canaanitess. And Er, first-born of Judah, is evil in the eyes of Jehovah, and He putteth him to death.

General references

Numbers 1:26
Of the sons of Judah -- their births, by their families, by the house of their fathers, in the number of names, from a son of twenty years and upward, every one going out to the host --