Geographical name changes in Greece
The Greek state has systematically pursued a policy of Hellenisation following its independence from the Ottoman Empire in the early 1830s. This ideology included replacing all geographical and topographic names with revived names rooted in Classical Greece – that is, any name deemed foreign, divisive against Greek unity, or considered to be "bad Greek" was hidden or assimilated.
Source: Wikipedia — Geographical name changes in Greece (CC BY-SA 4.0)