וּלְעֵ֥בֶר יֻלַּ֖ד שְׁנֵ֣י בָנִ֑ים שֵׁ֣ם הָאֶחָ֞ד פֶּ֗לֶג כִּ֤י בְיָמָיו֙ נִפְלְגָ֣ה הָאָ֔רֶץ וְשֵׁ֥ם אָחִ֖יו יָקְטָֽן׃
And unto Eber were born two sons: the name of the one was Peleg; for in his days the earth was divided; and his brother’s name was Joktan.
Read kabbalistic (mystical) interpretation of I Chronicles 1:19: and classical mystical sources.