A long time ago a self proclaimed Simpson officianado told me that Springfield was the most common city name & found in every state. Later I worked in a job that put me in position to study the dynamics of city growth & I learned that Greenville is actually found in over 40 states (Springfield is not). Since I had already been to 3 cities with such a name, whenever I travelled close enough to one, I'd make a detour to go. There are 3 things I learned. 1) the only thing they have in common is the name 2) it's not always green in greenville & 3) people who live in these do not care that's its the most popular name for a city.
I think Arlington is also a popular name, I've seen it on maps pretty often.