Theodoret of Cyrus
Why did Moses reveal not just the father but also the brother of Aaron's wife? He highlights the link between the royal and priestly lineages, for Naasson is the son of Amminadab, Amminadab is the son of Aram, Aram is the son of Esrom, Esrom is the son of Phares, and Phares is the son of Judah. Through this bloodline, the Lord arose in the flesh. Thus, his reminder of the connection between these two tribes is significant, demonstrating that the Lord Christ emerged from both, fulfilling the roles of both King and Priest in human form.