Did one of Goliath's brothers have different colored eyes?
Goliath the Gittite was a legendary giant who fought on the side
of the Philistines, who occupied the rich coastal plains of
Palestine, from Egypt to about a far north as modern Tel Aviv.
Two conflicting stories in the Bible are evidence that Goliath
was a 'bogy-man' of legend, rather than a real person. 1 Samuel
chapter 30 reports that the future king, David, killed Goliath. But
2 Samuel 21:19 says that Elhanan killed the same Goliath.
1 Chronicles, written probably a hundred years after the
Deuteronomist history (which includes the Books of Samuel) and
apparently dependent on the Deuteronomist history , attempted to
resolve this in two ways. First, there is no mention of David
killing Goliath, even though the Book of Kings presents this at the
most important single feat leading to David being accepted as a
potential king. Second, at 20:5, the book says that Lahmi (Elhanan)
killed the brother of Goliath.
So, the biblical evidence points to Goliath not really having
existed, as does the archaeological evidence. If Goliath was just a
myth, it is not really possible to say whether his brother had
different coloured eyes. Any legendary tradition about the colour
of his eyes is just speculation.