Numbers 1:7

And Aaron took Elisheba, the daughter of Amminadab, the sister of Nahshon, as a wife, and she bore him Nadab and Abihu, Eleazar and Ithamar.

“Now those who camp on the east side toward the sunrise shall be of the standard of the camp of Judah, by their armies, and the leader of the sons of Judah: Nahshon the son of Amminadab,

Then the leaders of Israel, the heads of their fathers’ households, brought an offering near (they were the leaders of the tribes; they were the ones who were over the numbered men).