When God created the world, He had to accept the fact that some of His creatures would sin and ultimately fail to repent and be saved (I'm assuming that universalism is false, to be clear). For example, suppose that X is one of such people. In this world, X fails to repent and gets condemned. One could ask the following question about X: "Okay, X gets condemned in this world, but was it theoretically possible for God to have created a different, counterfactual world in which X would have been saved?". For example, if X had been born and raised in ideal conditions, say, if X had been filled with the Holy Spirit since he was in his mother's womb (like John the Baptist was), who knows, perhaps under those counterfactual conditions X would have been saved. However, God didn't create that ideal world for X. Instead, He created this world. And in this world, unfortunately, X doesn't make it to Heaven ... Which sounds terrible. If God is a loving father, and if there is at least one possible world in which X would be saved, for sure God would create that world so that X gets actually saved, right?
This can lead to entertain the idea that, perhaps, God didn't create a world in which X would get saved because there is no such world in the first place. That is, no matter what world God could have created, in all possible worlds X always systematically fails to be saved. God exhaustively searched all the "alternative worlds space" and couldn't find a single world in which X is saved. And perhaps, all the people who freely reject salvation in this world are people who would have also freely rejected salvation in all other possible worlds. In other words, some individuals are just unsavable. They freely mess up always, no matter the world in which you create them.
Does this belief have a name?
I found this related question How do molinists justify a world where not everyone freely chooses salvation?, and so Molinism is surely relevant to this discussion of free will and counterfactual worlds, but I'm specifically interested in finding out if there is an official name for the specific belief that some individuals are unsavable in all possible worlds. Or at least I would like to know if there are any Christian groups who believe this.