וְהַחוֹנִ֥ם עָלָ֖יו מַטֵּ֣ה שִׁמְע֑וֹן וְנָשִׂיא֙ לִבְנֵ֣י שִׁמְע֔וֹן שְׁלֻמִיאֵ֖ל בֶּן־צוּרִֽי־שַׁדָּֽי׃
and those that pitch next unto him shall be the tribe of Simeon; the prince of the children of Simeon being Shelumiel the son of Zurishaddai,
Read kabbalistic (mystical) interpretation of Numbers 2:12: and classical mystical sources.