Parashat Vayigash lists the seventy souls who came to Egypt with Yaakov. What is the significant difference between this list and the one in Parashat Vayishlach? One detail that jumps out is that one refers to Yaakov and the other one mentions Yisrael. But is there more than that? We examine the list of Esav's descendants, as well as the names for other family groupings (such as "Yehuda and his brothers") and find meaning in these distinctions.