From Heart of Mary Women’s Fellowship:
Raphael poses as a distant relative of Tobit’s family and offers to be Tobias’s traveling companion since he knows the way to get to Media. Tobit is more assured that Tobias will be safe, knowing that he’s traveling with someone the family can trust. The name that Raphael assumes, Azariah, means “God has helped,” which means that Sarah and Tobit will end up being saved, but not in the way that they expected.
But wait! There’s more!