Another author considers that the interior of Thrace have never been Romanized or Hellenized (Trever, 1939). This was followed also by Slavonization. According to Weithmann (1978) when the Slavs migrated, they encountered only a very superficially Romanized Thracian and Dacian population, which had not strongly identified itself with Imperial Rome, while Greek and Roman populations (mostly soldiers, officials, merchants) abandoned the land or were killed. Because Pulpudeva survived as Plovdiv in Slavic languages, not under Philippopolis, some authors suggest that Thracian was not completely obliterated in the 7th century.