It is easy to do in Blueman
sudo apt install blueman
Open Blueman, right click on device, then rename, it is only valid on the computer you run the commands on.
You can also use bluetoothctl
in terminal with the set-alias
command after connecting to one of the devices. My test below
[bluetooth]# connect AC:9B:0A:4F:CA:FF
Attempting to connect to AC:9B:0A:4F:CA:FF
[CHG] Device AC:9B:0A:4F:CA:FF Connected: yes
Connection successful
[CHG] Device AC:9B:0A:4F:CA:FF ServicesResolved: yes
[MDR-ZX770BT]# set-alias Sony-Mega
[CHG] Device AC:9B:0A:4F:CA:FF Alias: Sony-Mega