1 Chronicles 2:10

Now these are the names of the sons of Israel—of Jacob and his sons—who were coming to Egypt: Reuben, Jacob’s firstborn.

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,

And Judah was the father of Perez and Zerah by Tamar, and Perez was the father of Hezron, and Hezron was the father of Ram.