Bible Dictionaries
Onan

Hastings' Dictionary of the Bible

ONAN . A son of Judah ( Genesis 38:4; Genesis 46:12 , Numbers 26:19 , 1 Chronicles 2:3 ). After the decease of his elder brother, Er, he was instructed by his father to contract a levirate marriage with Tamar. The device by which he evaded the object of this marriage ‘was evil in the sight of the Lord, and he slew him’ ( Genesis 38:8-10 ).

Bibliography Information
Hastings, James. Entry for 'Onan'. Hastings' Dictionary of the Bible. https://www.studylight.org/​dictionaries/​eng/​hdb/​o/onan.html. 1909.