- The son or male-line grandson of an Emperor of the Austro-Hungarian Empire.
- World War I traditionally started with the assassination of Archduke Francis (Franz) Ferdinand.
- Dutch: aartshertog
- French: archiduc
- German: Erzherzog
Etymology: From , from archeduc (modern: archiduc).
- Hungarian: fÅ‘herceg
- Italian: arciduca
- Spanish: archiduque
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