Aethicus Ister
Aethicus Ister is a writer, geographer and philosopher.
Also recorded as Aethicus; Ethicus.
In detail
the recorded working language is Ancient Greek.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Aethicus Ister”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q225857: Aethicus Ister
Consult the source