The aim of this contribution is to give on overview of the different conceptions regarding the etymology of Lusitanian word 'Reve'. In Lusitanian, the name of a god is attested nine times in the dative singular 'Reve'. There are different opinions on the etymology of this theonym. According to F. Villar, Lus. 'Reve' = Lat. 'Rivus'. K.T. Witczak believes that the god in question is an exact equivalent of Greek Zeus and Roman Iupiter (i.e. 'Reve' < *diu-ei or *dyeu-ei) and claims that in Lusitanian *d > r. But F. Vilar and R. Pederero enumerate many place names with d unaltered. According to the present author, the initial consonant in 'Reve' is to be accounted for by what he calls irregular sound change due to frequency.
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