Which giant did Elhanan kill?

Answer 1

Goliath

2 Samuel 2119 And there was again a battle in Gob with the Philistines, where Elhanan the son of Jaareoregim, a Bethlehemite, slew the brother of Goliath the Gittite, the staff of whose spear was like a weaver's beam.

AnswerThe name of the brother of Goliath is given in the verse below from 1 Chronicles. The translators quite properly inserted the 'brother of' due to the likely omission of this by some earlier copyist. That this is an insertion is made clear in all KJV Bibles by italics. 1 Chronicles 20:5 (King James Version)5 And there was war again with the Philistines; and Elhanan the son of Jair slew Lahmi the brother of Goliath the Gittite, whose spear staff was like a weaver's beam. Thus, the Biblical record makes it clear that David killed Goliath while Elhanan, as clarified with more detail by 1 Chronicles killed Lahmi Goliath's brother.