Lichtensteiner’s or Lichtenstonians? or just Licher’s for short
How come you never hear of Lichtensteiner-American heritage? Everywhere you look it’s African-Americans, German-Americans, Polish-Americans…and so on. But no Lichtenstein-Americans?
Seeing as how the population of Liechtenstein is 33,436 (CIA World Factbook), even if the entire population emigrated here, there would hardly be enough of them to make a single significant ethnic neighborhood in a major city, much less a noteworthy hyphenated group.
For all intents and purposes, it’s an appendage of Switzerland anyhow.
And, if I must, I would just say “citizens of Liechtenstein”. “Liechtensteiners” seems to be used, however.