And she conceiveth, and beareth a son, and he calleth his name Er;
Referenced Verses
Gen 46:12 : 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.
Num 26:19 : 19 Sons of Judah `are' Er and Onan; and Er dieth -- Onan also -- in the land of Canaan.