"Xiamen" is the name of a city in Fujian province, China, and is where the Min Nan dialect is spoken.
Here's why it's confusing:
* Xiamenese is a specific sub-dialect of Min Nan spoken in the Xiamen city.
* Hokkien is the more common term for the broader Min Nan dialect family, which includes many other sub-dialects spoken across southern Fujian, Taiwan, and parts of Southeast Asia.
So, while Xiamenese is a dialect spoken in Xiamen, it's more accurate to say that the main dialect spoken in Xiamen is Min Nan or Hokkien.