Now that isekai has firmly established itself as a subgenre in western storytelling (although it has always been there in some form), it got me thinking about what to call the subgenres of isekai itself.

If isekai itself is being transported to another world/universe, and reverse isekai is someone from another world being transported to ours... Then what do we call someone from another world being transported to another other wold? Or someone from our world being transported to another time in our world? Do these have names already?

Setting aside if we like or appreciate isekai, if they don't have genres names yet I thought it'd be funny to come up with our own. What do you think we should call all the sub-subgenres?