Genesis 38:3

New Living Translation

she became pregnant and gave birth to a son, and he named the boy Er.

Cross References

Genesis 46:12

The sons of Judah were Er, Onan, Shelah, Perez, and Zerah (though Er and Onan had died in the land of Canaan). The sons of Perez were Hezron and Hamul.

1 Chronicles 2:3

Judah had three sons from Bathshua, a Canaanite woman. Their names were Er, Onan, and Shelah. But the Lord saw that the oldest son, Er, was a wicked man, so he killed him.

Numbers 26:19

Judah had two sons, Er and Onan, who had died in the land of Canaan.