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Family name Leko (Leko , Леко , レコ ) , in all the world, is a common cognomen. The cognomen Leko is characteristic of Southern Europe, particularly Bosnia and Herzegovina, where it is quite a common surname, Croatia, and Serbia, where it is quite a rare surname. In absolute terms, this name is the most popular in the Democratic Republic of the Congo, Bosnia and Herzegovina, and Croatia. Much less frequently, Leko is the forename as well as the last name.