What the Bible says about Moses ' Family
(From Forerunner Commentary)
Moses' family was not one of any distinction in Israel. He was descended from Levi through Kohath to Amram who married Jochebed. Jochebed was Amram's aunt, strangely enough; she was his father's sister. She was probably about the same age as Amram or maybe even younger. From that marriage, Moses was born. It is interesting to consider that, in Leviticus 18:12, such marriages were forbidden, but this was before that injunction. Nevertheless, Moses was the product of an interesting relationship.
John W. Ritenbaugh
Conviction and Moses