A separate artist should be created if an artist performs under a different name that they consider as a different project linked by their legal name. What should be done if their legal name is not known, or only a partial name (nickname, first/last name only) is known?
I’ve added “Initial. Surname” in the past, when I just knew that. If you know nothing at all, you could I guess link them all to the oldest / best known project and explain in the annotation of that project why that is done (but that will show that as “legal name” which is of course not quite right), or add an artist like “[legal name for X and Y]” (but that admittedly looks a bit silly )
How about no real link, but just link them through the annotation if no part of the legal name is known?
Yeah, I forgot about the annotation. That could be a temporary solution. Thanks.