I Chronicles 1:36

The sons of Elifaz (were) Teiman, Omar, Tzfi, Gatam, Kenaz, Timna and Amalek.

This verse is confusing because Genesis 36:12 tells us that Timna was the name of the concubine of Elifaz, not his son! Ramban tells us that Timna died giving birth to a son, whom she named Timna after herself as a legacy. Elifaz renamed the boy Korach, who is the son suddenly referenced in Genesis 36:16 and who is not otherwise accounted for by our verse in Chronicles.