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.
Goliath
Tell es-Safi, the biblical Gath and traditional home of Goliath, has been the subject of extensive excavations by Israel's Bar-Ilan University. The archaeologists have established that this was one of the largest of the Philistine cities until destroyed in the ninth century BC, an event from which it never recovered. A potsherd discovered at the site, and reliably dated to the tenth to mid-ninth centuries BC, is inscribed with the two names "alwt" and "wlt". While the names are not directly connected with the biblical Goliath ("glyt"), they are etymologically related and demonstrate that the name fits with the context of late-tenth/early-ninth-century BC Philistine culture. The name "Goliath" itself is non-Semitic and has been linked with the Lydian king Alyattes, which also fits the Philistine context of the biblical Goliath story. A similar name, Uliat, is also attested in Carian inscriptions. Aren Maeir, director of the excavation, comments: "Here we have very nice evidence [that] the name Goliath appearing in the Bible in the context of the story of David and Goliath … is not some later literary creation."