Agathosthenes was a Greek

Greeks

The Greeks, also known as the Hellenes , are a nation and ethnic group native to Greece, Cyprus and neighboring regions. They also form a significant diaspora, with Greek communities established around the world....

 historian

Historian

A historian is a person who studies and writes about the past and is regarded as an authority on it. Historians are concerned with the continuous, methodical narrative and research of past events as relating to the human race; as well as the study of all history in time. If the individual is...

 or philosopher of uncertain date, who is referred to by Tzetzes

John Tzetzes

John Tzetzes was a Byzantine poet and grammarian, known to have lived at Constantinople during the 12th century.Tzetzes was Georgian on his mother's side...

 as his authority in matters connected with geography. There is mention of a work of Agathosthenes called "Asiatica Carmina", where some writers read the name "Aglaosthenes"; for Aglaosthenes or Aglosthenes, who is by some considered to be the same as Agathosthenes, wrote a work on the history of Naxos

Naxos (city)

Naxos is a town and a former municipality on the island of Naxos, in the Cyclades, Greece. Since the 2011 local government reform it is part of the municipality Naxos and Lesser Cyclades, of which it is the seat and a municipal unit. It has 6,533 inhabitants . The Naxos municipal unit covers an...

, of which nothing is extant, but which was much used by ancient writers.