from
Easton's 1897 Bible Dictionary
Elhanan
whom God has graciously bestowed. (1.) A warrior of the time of
David famed for his exploits. In the Authorized Version (2 Sam.
21:19) it is recorded that "Elhanan the son of Jaare-oregim, a
Bethlehemite, slew the brother of Goliath." The Revised Version
here rightly omits the words "the brother of." They were
introduced in the Authorized Version to bring this passage into
agreement with 1 Chr. 20:5, where it is said that he "slew Lahmi
the brother of Goliath." Goliath the Gittite was killed by David
(1 Sam. 17). The exploit of Elhanan took place late in David's
reign.
(2.) The son of Dodo, and one of David's warriors (2 Sam.
23:24).