So she conceiued and bare a sonne, and he called his name Er.
Referenced Verses
Gen 46:12 : 12 Also the sonnes of Iudah: Er, & Onan, and Shelah, and Pharez, and Zerah: (but Er and Onan died in ye land of Canaan) And the sonnes of Pharez were Hezron and Hamul.
Num 26:19 : 19 The sonnes of Iudah, Er and Onan: but Er and Onan died in the land of Canaan.