Elhanan, son of Jair
Elhanan son of Jair-Oregim the Bethlehemite ( "’Elḥānān ben-Ya‘rê ’Ōrəḡîm Bêṯhallaḥmî") appears in 2 Samuel 21:19, where he is credited with killing Goliath. As this contradicts the better-known story in 1 Samuel 17 in which it is the famous David who kills Goliath, the 4th century BC Book of Chronicles explains the second Goliath by saying (20:5) that Elhanan "slew Lahmi the brother of Goliath", possibly constructing the name Lahmi from the last portion of the word "Bethlehemite" (""beit-ha’lahmi"). The King James Bible translators modified 2 Samuel 21:18–19 to make it read as if Elhanan had slain Goliath's brother: "And there was again a battle in Gob with the Philistines, where Elhanan the son of Jaare–oregim, a Beth–lehemite, slew "the brother of" Goliath the Gittite, the staff of whose spear was like a weaver's beam", although the Hebrew text at this point makes no mention of the word "brother"; the medieval Jewish authors of the Targum Jonathan solved the problem by explaining Elhanan as an alternative name for David. However, this makes it difficult to explain why David is called "Elhanan" in verse 19 but consistently "David" in the verses that surround it (15, 16, 17, 21, 22). The most widely accepted explanation is that the storytellers have displaced the deed from the obscure Elhanan to the more famous character, David.
Books of Chronicles
The Chronicles narrative begins with Adam and the story is then carried forward, almost entirely by genealogical lists, down to the founding of the first Kingdom of Israel (1 Chronicles 1–9). The bulk of the remainder of 1 Chronicles, after a brief account of Saul, is concerned with the reign of David (1 Chronicles 11–29). The next long section concerns David's son Solomon (2 Chronicles 1–9), and the final part is concerned with the Kingdom of Judah with occasional references to the second kingdom of Israel (2 Chronicles 10–36). In the last chapter Judah is destroyed and the people taken into exile in Babylon, and in the final verses the Persian king Cyrus the Great conquers the Neo-Babylonian Empire, and authorises the restoration of the Temple in Jerusalem, and the return of the exiles.