Or HaChaim on Exodus 6:14/אור החיים על שמות ו׳:י״ד

1 אלה ראשי בית אבותם, These are the heads of the various families, etc. The reason the family background of Moses is listed here is in accordance with the principle that only people whose genealogy can be traced back directly to Jacob are fit to be appointed as kings over Israel. This is the reason the Torah did not state the יחוס of Moses and Aaron until they had been given Royal authority. This is all still part of the answer of G'd to Moses' comment that the Israelites did not and would not listen to him.