Why did other carriers not name it the Super 80...you got me!
Why don't other carriers call their aircraft Luxury Liners (also an American thing)? As mentioned, the aircraft was originally called the DC-9 Super 80, before getting the new moniker of MD80 series.
As for carriers in your neck of the woods, Alitalia and SAS are the biggest operators with at least 90 and 72 each at one point (this includes different models: the -81, -82, -83, etc.). Some other notable European carriers who operate/operated a decent sized fleet of MD80s are/were Aero Lloyd, AOM, Austrian, Finnair, Iberia, Meridana, Spanair, and many other operators in the area with a couple. Some of these are in the process of replacing them with newer Boeings or Airbuses, but the MD
-80 was still a popular model. It also had success with other airlines like Japan Air System (now merged with JAL), Korean Air, and some of the Chinese carriers (mainly with models built under license in China) in Asia and airlines like Avianca, Aviaco, and Aerolineas Arentinas in Latin America.
USAirways and Trans World used to operate large fleets, but have since been disposed in the first case and absorbed into AA
in the second case. Needless to say, it was quite a popular and successful aircraft. There were 976 DC-9s built, about 1200 MD
-80 series built, close to 100 MD
-90s built, and the 717 (formerly the MD
-95) is likely in the vicinity of 125-150 aircraft built. Sorry, I will try to find exact figures for the latter three models.