how to know which id number = character name ?

[Anceane]

I am asking this, as i realised that a lot of my characters settings addons are saved in savedvariables 2 times under different denomination.

First : number ID
second : character name

Is there a way to find which number ID = name character so i can purge some of the settings ?

Also, old characters deleted months ago still appear on some (not all) savedvariables, though those savedvariable have been deleted and started a new.

Any idea how to remove them definitily ?

Thank you