אֵ֣לֶּה בְנֵי־אֶפְרַיִם֮ לְמִשְׁפְּחֹתָם֒ לְשׁוּתֶ֗לַח מִשְׁפַּ֙חַת֙ הַשֻּׁ֣תַלְחִ֔י לְבֶ֕כֶר מִשְׁפַּ֖חַת הַבַּכְרִ֑י לְתַ֕חַן מִשְׁפַּ֖חַת הַֽתַּחֲנִֽי׃
These are the sons of Ephraim after their families: of Shuthelah, the family of the Shuthelahites; of Becher, the family of the Becherites; of Tahan, the family of the Tahanites.
Read kabbalistic (mystical) interpretation of Numbers 26:35: and classical mystical sources.