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In the world, Δούκας (Duca , Doukas , Dukas ) is quite a rare dominantly boy's, but uncommonly girly first name. The first name Δούκας is characteristic of Greece, where it is quite a rare masculine name, Romania, where it is quite a rare unisex name, and Serbia, where it is a rare female name. In absolute terms, the name is most common in Greece, Italy, and Romania. More frequently, Δούκας is the last name as well as the forename.
Δούκας is also a name for the fictitious and mythical characters: Duca Lamberti , the literary figure and Duca d'Alziras , the operatic character in the opera La zingara by Gaetano Donizetti.