Grognor comments on Ask an experimental physicist

[Grognor]

You could go with what Everett wanted to call it in the first place, the relative state interpretation.

To answer your “Edit” question, no, the relative state interpretation does not include probabilities as fundamental.

[witzvo]

You could go with what Everett wanted to call it in the first place, the relative state interpretation.

Thanks! Getting back to original sources has always been good for me. Is that “Relative state” formulation of quantum mechanics?