Zminec was attested in historical sources as Trachen in 1291 and 1392, Traken in 1421, and Smintzi in 1501.[3][4] The Slovene name comes from the adjective *zmьjьnъ 'snake's, dragon's' (from the common noun *zmьjь 'snake, dragon'), as confirmed by the medieval attestations containing Middle High Germantrachen 'dragon'. The reason for the name is unknown, but it may be connected to the Slovene plant name zminec 'snakeshead', also derived from *zmьjь 'snake, dragon'.[4]