וַיַּעֲשׂ֥וּ מִלְחָמָ֖ה עִם־הַֽהַגְרִיאִ֑ים וִיט֥וּר וְנָפִ֖ישׁ וְנוֹדָֽב׃
און זײ האָבן געמאַכט אַ מלחמה מיט די הַגריאים, און איטור, און נָפֿיש, און נוֹדָבֿ.
Radak
שנים עשר נשיאים לאומתם, twelve princes corresponding to the number of their families (tribes). Each one of the ones named by the Torah was a tribal chief, member of a family which grew into a mighty tribe bearing the name of their first founder. We find further detailed examples of these tribes in Chronicles I 5,19. A number of these tribes have been mentioned in different contexts in the Books of the Prophets.