Josef_Bretones

It could really work in many cities. During the Middle Ages there were chivalric orders throughout Europe. 

 My favorite names for the cities you want to add to your league:

Amsterdam: Millers

Barcelona: Almogaraves

Brussels: Atoms (maybe Senators o  because is the headquarters of European Union) 

Dublin: Druids (I think is very original) 

Dusseldorf: Technos (in Spain the popular name for the electronical music is "Techno" but I don't know is the same in Germany) 

Frankfurt: Sorcerers

Glasgow: Liberators (For William Wallace) London: I suggest you 'Towers because it's the name I was going to use for the second London team that I discarded (or Bulldogs). 

Manchester: Machines (I like it) 

Munich: Brewers

To be continued

Paris: Muskeeters. I really like that name. 

Rome: Gladiators or maybe Rome Praetorians (the guard of emperator). 

Stockholm: Hammers

Vienna 

Zurich: Chronos (the time is very important to the swiss people). 

Milan Snakes (The coat of arms of the Visconti, lords of the city for centuries shows a snake devouring a man. This representation passed to the emblem of Alfa Romeo that was founded in Milan)