Don't mean to be rude, but this is a pet peeve of mine.
Ingvar, nn
Yves? That is very unnatural, and in real life, would never happen. People just wouldn't "get" it and so wouldn't abide by it. Same with
Lee and
Liam. They're full separate names, more or less the same length, and there's no reason to make one a nickname for the other.
Many of the others do seem natural though.
Adela nn Dela is OK (though
Addie is more plausible), and
Joachim nn
Joey works perfectly.
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Elinor♥