What does Luxembourg mean? A little castle on a rock

Luxembourg is one of those names people say every day without wondering where it comes from. The answer is refreshingly concrete. It was a little castle on a rock above a river, and you can still walk out onto that rock today. Everything else, the French, German and Luxembourgish versions, the grand duchy and even a Belgian province, grew from there.

A little castle called Lucilinburhuc

The government’s official portal puts it plainly. At the origin of Luxembourg is Lucilinburhuc, the «little castle» first mentioned in a document of 963. That year Count Sigefroi, the younger son of a count of the Ardennes with no great estate of his own, received a castellum on a rocky spur from the monks of St Maximin’s abbey at Trier, in exchange for other land. The spur is the Bock.

There’s a footnote I rather like, because it shows round dates come with small print. The portal notes that the charter formalising the swap actually dates from 987. The site sat close to the old Roman road from Reims to Trier, surrounded by good farmland, and a small fortified town grew up around it. By the 12th century it was a proper city. The rest of the story, century by century, is in history of Luxembourg.

The rock comes with a legend too. Sigefroi married Melusina, who asked for one day a week when no one, not even her husband, could see her. When curiosity got the better of him and he peeped through the keyhole, he found she had a fish’s tail. She leapt from the window, down onto the Bock rock, and disappeared amid a crash of thunder. The government presents it for what it is, a medieval myth found in many parts of Europe.

Luxembourg, Luxemburg or Lëtzebuerg?

Three administrative languages live side by side in the country, and each has its own version of the name. In French it’s Luxembourg and the state is the Grand-Duché de Luxembourg. In German it’s Luxemburg, and the state is the Großherzogtum Luxemburg. In Luxembourgish, the national language, the country is Lëtzebuerg and the language Lëtzebuergesch.

English borrows the French spelling, and the official portal’s English pages use Grand Duchy of Luxembourg. For a British visitor that’s all you need, Luxembourg for the country and Luxembourg City for the capital. The other identifier worth knowing is the international dialling code, +352, which you’ll see on every hotel, museum and restaurant number. When to expect each language depends on where you are, and the page what language do they speak in Luxembourg sets it out.

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One country, one capital and a Belgian province

Most mix-ups with the name are about geography. Luxembourg is the country, a grand duchy of 2,586 km². Luxembourg City is its capital, with 137,700 residents in 2026. And the Province of Luxembourg is Belgian. It came out of the 1839 Treaty of London, signed on 19 April, which divided the old territory and handed the western part to Belgium. The country’s borders haven’t moved since.

To keep things clear, throughout this guide I use Luxembourg for the country and Luxembourg City, or the capital, for the city. Why it’s a country in its own right and not part of Belgium is explained in is Luxembourg a country.

Where you’ll see the local name

You’ll meet the Luxembourgish form more often than you’d expect. According to the European Central Bank, every Luxembourg euro coin carries its year of issue and the word «Lëtzebuerg». Towns have two names as well, the official French or German one and a Luxembourgish one. Vianden is Veianen, Clervaux is Klierf and Esch-sur-Alzette is Esch-Uelzecht, after the Luxembourgish name of the Alzette.

The national anthem plays with the same names. Its opening line calls the Alzette «d’Uelzecht», and later it asks for protection for «d’Lëtzebuerger Land». I cover it with the other national symbols under the Luxembourg flag.

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A practical tip for booking

This has a use beyond pub-quiz trivia. Transport, museum and hotel websites in the country are in French, English or German, and their search boxes work best with the local spellings. I’d type Luxembourg for the capital and each town’s official name for everything else. And if you’re wondering what the people are called, that’s with the rest of the figures in Luxembourg population.

So you do not lose the morning at the ticket office, browse tickets and tours in Luxembourg on GetYourGuide.

If you would rather go at your own pace, see the car hire deals in Luxembourg: the earlier you book, the more cars are left to choose from.

Before you fix your dates, compare tickets to Luxembourg: the same journey can cost very different amounts from one day to the next.