The short ones the world adopted
Modern Scandinavia favors short, clean names, and that aesthetic travels on its own: two or three letters of transparent sound leave no room for error. This is the group any teacher, in any country, reads right the first time.
The ones that need a pronunciation note
The second group hides a sound the spelling does not deliver outside the north. Nothing forbids them — Ragnar proved the world can learn — but it helps to know what to expect at the first roll call.
The travel spelling
The Nordic hub's practical rule counts double here: nearly every name with ø, å or æ has an established adapted spelling, and it is the right choice for life outside Scandinavia. The sound changes little; the paperwork life changes a lot.
Sound contrast also works in your favor: a short northern name with a long Latin surname (Liv Moretti, Erik Fernandes) creates the rhythm the harmony checker rewards.
Meaning, rarity and the Viking tradition behind each — with a harmony test for your surname.