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(כה) וּלְעֵ֥בֶר יֻלַּ֖ד שְׁנֵ֣י בָנִ֑ים שֵׁ֣ם הָֽאֶחָ֞ד פֶּ֗לֶג כִּ֤י בְיָמָיו֙ נִפְלְגָ֣ה הָאָ֔רֶץ וְשֵׁ֥ם אָחִ֖יו יׇקְטָֽן׃
(25) Two sons were born to Eber: the name of the first was Peleg, for in his days the earth was divided; and the name of his brother was Joktan.
Why did עבר name his children פלג and יקטן?
How did he know this information?
How did language and nations develop?