What does Exodus 6:20 mean?

Amram was the oldest son of Kohath (Exodus 6:16, 18). First, he is described as husband of Jochebed "his father's sister." In other words, she was considered an aunt, though the connection may refer to a more distant family member. The emphasis of this passage remains on showing both the father and mother of Moses and Aaron are Levites.

This verse also clearly names the parents of Moses and Aaron. They were left unnamed in Moses' birth account (Exodus 2:1). Given her role in Exodus 2 and the age difference between Aaron and Moses (Exodus 7:7), it seems Miriam was the eldest, followed by Aaron, and then Moses (Exodus 15:20). Amram's lifespan is noted as 137 years, the same as Levi (Exodus 6:16). This means Amram was possibly still alive when Moses, at age eighty (Exodus 7:7), returned to Egypt. He may have died in the wilderness before entering Canaan (Numbers 14:29), or in Egypt before the nation was freed. The Bible does not clearly comment on either view. One Jewish tradition holds that Amram lived long enough to see his own great-great-grandchildren.