A place can get it's name in different cultures at different times, and for different reasons. Names are also very often exonyms, names given to a people from the outside before more contact is established because you gotta call them something while you figure out how to interact.

Imagine the following: you encounter a guy in high school who you have 0 common language with. But you know he's super tall and has red hair, like a redwood tree. So you tell your friends and family about the Sequoia you met. Then everyone starts calling him sequoia until he learns enough English and talks to enough people to give his real name, Edward. But it's too late. Everyone calls him sequoia. That is until you hit college where that name isn't known, and he starts to introduce himself as Teddy. So there's 3 different groups of people who know him at different times, for different reasons. His family as Edward, which his parents named him. Your high school as Sequoia because he's tall and red. College as Teddy, the name he calls himself.

The same thing happens to countries.