Descendants of Purgas. ErzyaDescendants of Purgas. Erzya2013Queuebrick VideoQueueLWatchedWFavoriteFListsDiscussionWhere to watchCopy short link2013Descendants of Purgas. Erzya24m·DocumentaryDirected by Ivan Tverdovsky, A documentary about the Erzya, a native ethnic group living between the Oka and Volga rivers.DirectorIvan TverdovskyDirectorEvgeny KokusevOverviewDiscussionCastCrewDetailsWhere to watchNo cast listed.