Pereyaslavets or Preslavets was a trade city located near mouths of the Danube. The city's name is derived from that of the Bulgarian capital of the time, Preslav, and means Little Preslav. In Greek it was also known as Presthlavitza (Πρεσθλαβίτζα). Several theories exist regarding the exact location of the city: either at Preslav or in its vicinity in Bulgaria, or at Isaccea, Nufăru, Murighiol or Jurilovca in Romania.