וְעָלָ֖יו מַטֵּ֣ה מְנַשֶּׁ֑ה וְנָשִׂיא֙ לִבְנֵ֣י מְנַשֶּׁ֔ה גַּמְלִיאֵ֖ל בֶּן־פְּדָהצֽוּר׃
and next unto him shall be the tribe of Manasseh; the prince of the children of Manasseh being Gamaliel the son of Pedahzur,
Read kabbalistic (mystical) interpretation of Numbers 2:20: and classical mystical sources.