There is, indeed, a modern municipality in Greece called Eleusis/Eleusina. It is best known for being the site of the Eleusinean Mysteries.
At her sanctuary in Eleusis.
The city of Byzantium is named after the Greek Byzas.
It is named after the greek goddess Athena
athena the greek godesss
Athens.
Athens
Louis Dyer has written: 'Vitruvius' account of the Greek stage' 'The Gods at Eleusis'
While Poseidon was the protector of many Greek city-states, none were named for him directly.
Rites of Eleusis was created in 1910.
Athens was named after the Greek Goddess Athena. In Greek mythology, she and Poseidon competed for the city. Zeus challenged them to create something that would be the most helpful to the people of the city. Poseidon created horse. Athena created the olive tree. Since the tree created both fruit and wood, she won.
Euclid Ohio was named in honor of the Greek Mathematician Euclid.
Athens