From the Netherlands and here the Raiders were huuuge in the 90's and are still fairly well-known. The Patriots have gotten more popular recently due to the Superbowl wins, also meaning Tom Brady has gotten a ton of coverage. Other teams that I see more often are the Cowboys, Seahawks, Giants, 49ers and Saints.
I think what might have shaped a lot of opinions is that the mainstream news here only covers the Superbowl and the controversies: the NFL's treatment of Kaepernick and those taking a knee was on the evening news a lot. Only football fans will usually know more teams and players.