His father's sister That is, kinswoman, as the Hebrew word frequently means. Amminadab A prince of the tribe of Judah. The Levites might marry into any tribe, there being no danger of confusion or loss of inheritance thereby.
Related Commentaries of Exodus 6:20
Exodus 6:20-23
20 And Amram took him Jochebed his father's sister to wife; and she bare him Aaron and Moses: and the years of the life of Amram were an hundred and thirty and seven years.
21 And the sons of Izhar; Korah, and Nepheg, and Zichri.
22 And the sons of Uzziel; Mishael, and Elzaphan, and Zithri.
23 And Aaron took him Elisheba, daughter of Amminadab, sister of Naashon, to wife; and she bare him Nadab, and Abihu, Eleazar, and Ithamar.