Now these are the generations of Perez: Perez begot Hezron; and Hezron begot Ram, and Ram begot Amminadab; and Amminadab begot Nahshon, and Nahshon begot Salma; and Salmon begot Boaz, and Boaz begot Obed; and Obed begot Jesse, and Jesse begot David.
This concurs with Seder Olam Chapter 12: "Nahshon son of Amminadab died in the second year after the Exodus.
(16) Even more so when we compare the last four ancestors to the earlier ancestors of King David: Judah, Perez, Hezron, Ram, Amminadab and Nahshon.
The sons of Hezron who were born to him: Jerahmeel, Ram, and Chelubai; and Ram begot Amminadab; and Amminadab begot Nahshon, the leader of the sons of Judah; and Nahshon begot Salma; and Salma begot Boaz, and Boaz begot Obed; and Obed begot Jesse; and Jesse begot his firstborn Eliab, and Abinadab the second, and Shimea the third, Nethanel the fourth, Raddai the fifth, Ozem the the sixth, and David the seventh (I Chron.
From Amminadab to Jesse we have a simple list of fathers and sons.
For they were descended from Judah on the mother's side ([GREEK TEXT NOT REPRODUCIBLE IN ASCII]), since in fact the great Aaron took the daughter of Amminadab as a wife, and accordingly the descendants of Judah and Levi became related.(23)
6:23 identifies Elisheba as the daughter of Amminadab and sister of the Judahite phylarch Nahshon.