Mine is an irony about the name of the Italian “Duce”. I know that in English it can have kind of a sense of Fascist nostalgia, like if I would have adopted AdolfHi let’s to say, but it isn’t the intention.
In Italian the word muso with a singles S (the surname was Mussolini with double S) means Muzzle. So, literally in Italian anybody would read Ben Muzzle as my nickname.
The other one I use (PAL) has a better appeal in English, and it strictly derives from my initials: P(ablo) A(lejandro) L(ucioni).
Regards,
Pablo