Aecatys's list "Names after cities and geographical areas" of 20 great name ideas: Delos - Eleusis!

Names after cities and geographical areas

Delos is a masculine name of Greek origin, derived from the name of the Greek island Delos in the Aegean Sea. In Greek mythology, Delos was the birthplace of Apollo and Artemis, making it a sacred location in ancient Greek culture. The name itself may be related to the Greek word 'delos' meaning 'visible' or 'clear,' as the island was said to have become visible when it emerged from the sea. As a given name, Delos is quite rare, carrying classical connotations and a connection to ancient history. It has occasionally appeared in English-speaking countries, particularly in the United States during the late 19th and early 20th centuries, often in families with an appreciation for Greek culture or classical education.

Delos

Evros 

Evrotas

Haimos

Kassos 

Kypros

Lousios

Naxos

Syros

Volos

Pontos

Olympos

Taygetos

Alinda

Amaseia

Byllis

Caria

Cercyra

Dacia is an ancient place-name -- it was in Eastern Europe -- as lacy as Dacey, but more substantial. 

Dacia

Eleusis