It is, though, questionable whether such a divinity was in fact worshiped by pagan Slavs. As the name itself is attested in more than a few valuable historic descriptions of Slavic mythology, it is somewhat indistinct whether it refers to a deity or to a city of pagan Slavs. The third possibility is that during these 70 years in a pagan Slavic community, the deity Svarogich was replaced by a deity Radegast, plus the city name was changed from Radegast to Rethra. The fourth option is that Svarogich plus Radegast were two names of the same god, and so as to the city of Rethra was also known by one of the names of its patron deity, Radegast. There are several arguments which indicate that the primary explanation is the correct one.
His description of worship of Radegast is basically the similar as Thietmar's account of Svarogich, apart from the move in the name. By difference, Radegast as a god is mentioned only by Adam and Helmold, which, as stated already, can be explained simply by their misinterpretation of Thietmar. Thus, the end would be so as to Radegast was a holy city and probably a well-known prophesy of the West Slavic tribe of Rethriani or Redriani, where they worshiped Svarogich as their main god. On the other give, of course, it might not be so. Still myths concerning him were constructed based on a variety of folk customs of sacred hospitality.
J. R. R. Radegast is too a make of Czech beer.
Adam of Bremen, Gesta Hammaburgensis Ecclesiae Pontificum. Helmold, Chronicon Slavorum.