“Onan” means strong

Onan: the second son of Judah by the Canaanitess, "the daughter of Shua." (Genesis 38:4; 1 Chronicles 2:3) "What he did was evil in the eyes of Jehovah and he slew him also, as he had slain his elder brother. (Genesis 38:9) His death took place before the family of Jacob went down into Egypt. (Genesis 46:12; Numbers 26:19) (B.C. 1706.)