Macaron. I liked it because I wanted my town to be neat and a joy to look at...like a macaron I guess??? //>u< And it's not really common, though I've seen it used before.
Mine is "Dream" just because I don't know, I want to create my "Dream" town in this town after resetting like 2 other times. SO I CAN QUIT THIS GAME ALREADY LFAJSIJWAER
Cosmos for my main town, because that was the name of my favourite song at the time and because I love space. It's not after the flower I don't like the flower lol.
Jupiter for my second town...because I love space (and then I reset and named it Jupiter again because I realized I could name my mayor and the other characters after the four Galilean moons...)
Originally I had named my town Pluto. I've always been fascinated by space and the (dwarf) planet, so when I restarted my town a little while ago I thought it'd be cool to name my town after Pluto's largest moon. Charon.
My town is named Rideaux. The name is based off of two things- the first being the fact that I had to redo my town after my save file corrupted. The other is the Rideau Canal in Ottawa, which runs right through the city, similar to the rivers in Animal Crossing towns.