Simplify the following text for a Grade 2 native English-speaking person.
Original: According to a Byzantine historian of the 14th century , Volos was known as `` Golos '' . The most widely accepted theory for the derivation of the city 's name suggests that Volos is a corruption of the Mycenaean Iolkos , which had become distorted through the ages to become `` Golkos '' , later `` Golos '' , and subsequently `` Volos '' .
Simplified: Volos is a Greek city .