she conceaued and bare a sonne, whom she called Er.
Referenced Verses
Gen 46:12 : 12 The childre of Iuda: Er, Onan, Sela, Phares & Serah. But Er and Onan dyed in the lande of Canaan. The childre of Phares: Hesron and Hamul.
Num 26:19 : 19 The children of Iuda, Er & Onan, which both dyed in the lade of Canaan.