Wednesday Boy
The Nerd WhoFell to Earth
In my experience if the name can be one Bart uses to call Moe's, it's a joke name.
There might be an element of knowing your players. I've played in a game with a monk named Lo Mein and a bard named Marky Desade. Those players like corny jokes and it was apparent that they thought the names were funny and picked them to make a joke. But really if any of my friends gave their character a homophone name (Marky Desade, Lo Mein, Dat Man, Hugh Manly, etc.) I would have a difficult time believing that they were genuine when naming them.
There might be an element of knowing your players. I've played in a game with a monk named Lo Mein and a bard named Marky Desade. Those players like corny jokes and it was apparent that they thought the names were funny and picked them to make a joke. But really if any of my friends gave their character a homophone name (Marky Desade, Lo Mein, Dat Man, Hugh Manly, etc.) I would have a difficult time believing that they were genuine when naming them.