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In all the world, ルカーシュ (Lukáš , ルカーシュ) is a common boy's first name. The given name ルカーシュ is characteristic of Eastern Europe, particularly Czechia, where it is a common boy's name, and Slovakia, where it is quite a common masculine name. Very seldom, ルカーシュ is the last name as well as the forename.
ルカーシュ is also a name for the fictitious and mythical characters: Lukáš , the operatic character in the opera The Kiss by Bedřich Smetana; a young widower.