It makes me think of the Lummi ("LUM-ee") Indian Tribe, here in the Pacific Northwest (U.S.). That's not a bad reference. Just a different feeling than
Lumi / snow.
Is it "LOO-mee" or "LUM-ee?" If the former, then I can get behind it, especially with a Scandinavian surname. But if it's the latter, then I don't care for the sound of it as a name. It would rhyme with tummy.