Hezron was the father of Ram, who was the father of Amminadab.
Nahshon was the son of Amminadab. Amminadab was the son of Admin. Admin was the son of Arni. Arni was the son of Hezron. Hezron was the son of Perez. Perez was the son of Judah.
Ram was the father of Amminadab. Amminadab was the father of Nahshon. Nahshon was the father of Salmon.
Aaron married Elisheba, the daughter of Amminadab and the sister of Nahshon. Elisheba gave birth to Nadab, Abihu, Eleazar, and Ithamar.
This is the family history of Perez, the father of Hezron.
Amminadab was the father of Nahshon, who was the father of Salmon.