Xenia, Ohio is a U.S. city. It is the only city in the U.S. that starts with the letter X.
No city in Europe begins with the letter X.
Xanthi is a city in Greece.
Xuthus, better known has Greek Goddess Hellen's son, but he was not really a god just a mythical ancestor of the Achaeans and Ionians. There was no Greek God or Goddess that's name starts with an X really.
Xam Neua is a city in Laos.
Xenia, Ohio,
Xuân Dục
Xenia, Ohio
xander
Xai Xai
some thing you can find in Europe that starts with x a xylophone
I can't think of a lot but : Xanthos and Xanthus