Voklo was attested in written sources in 1238 as Hv̊lwe. The Slovene name is derived from Lókvo, thus referring to a local geographical feature. Phonologically, it is the result of a dialect development in which l- > w- followed by dissimilation of the genitive, creation of the new feminine nominative wọ́kla, and subsequent reanalysis of the accusative wọ́klo as a neuter nominative. In the local dialect, the name of the village is Wọ́ku. In the past the German name was Hülben.