In addition to the sibling comment explaining the difference, consider that Vienna is an old city with many equivalent names in many languages. These names deve

In addition to the sibling comment explaining the difference, consider that Vienna is an old city with many equivalent names in many languages. These names developed naturally over an extended period of time. Hawaii does not have an equivalent history and so has no equivalent name in English. If the (English-speaking) people who live in such a place want to spell it in a specific way, what kind of an arrogant ass are you to tell them otherwise? Are you going to also bristle at and take umbrage with the spelling "Reykjavík" instead of "Reykjavik"?