Originally the god Perun, also the common Slavic word for thunder, was nothing more than the Germanic Thor in a Slavic disguise. Later texts equate Perun with Zeus. In Mansikka p. 202, the ‘Conversation of the Three Church Fathers’ Perun is referred to, together with his Cypriot counterpart Chors, angel of thunder and of lightning. They are the tutelary gods of the aristocratic and political elite, who have assimilated foreign, mainly Germanic and Iranian traditions. Therefore, they appear as thunder or sun gods, which is foreign to the old Slavic clan numen.

(Vyncke, 1969)