You see, the story did not originally come with a title. Titles, like labels, can be helpful. And, then, titles, like labels, can be not so helpful. You see, the trouble with titles and labels is that they're not story friendly. Titles and labels tend to domesticate and tame good stories until the stories become easy and small-time.
Titles are dangerous precisely because they make parables manageable.
Hey, parables are like people. Parables cannot be managed. Show me a managed parable and I will show you a very dead parable. You see, the trouble with that title is that it shifts attention from the family and privileges one member of the family as though the whole parable is about one member of the family. This is not a Hollywood production where there must be just one star and everybody else is supporting cast.