Treasury of Scripture Knowledge
Er and onan
And it came about at that time, that Judah
departed from his brothers and visited a certain Adullamite, whose name was Hirah.
The sons of Judah: Er and Onan and Shelah and Perez and Zerah (but Er and Onan died in the land of Canaan). And the
sons of Perez were Hezron and Hamul.
1 Chronicles 2:3
The sons of Judah were Er, Onan and Shelah; these three were born to him by Bath-shua the Canaanitess. And Er, Judah’s firstborn, was wicked in the sight of the Lord, so He put him to death.
Of the sons of Judah, their genealogical registration by their families, by their fathers’ households, according to the number of names, from twenty years old and upward, whoever was able to go out to war,