A free mod for Fallout 4, by drdanzel.
It lets you change the names of your followers and other NPCs to whatever you want. It supports all languages that are supported in-game. It has a very easy interface to use, and it can be installed and run without the need to be rooted.
The only thing you need to do is to download it, install it, and run it. It is that simple.
It has a number of different options for you to choose from, including the ability to change the names of your followers.
If you feel like you want to use a couple of the names and not fill your Data folder with batch files, you can do that with this mod. You can use any name you want, and you can choose the type of name you want to use (NPC or settler).