Well the grinch lives in both whoville and the outskirts of whoville. The mountain is considered not part of whoville but the grinch considers himself part of whoville.
Mt. Crumpit
The only name that the Grinch is ever called is simply "The Grinch".
on the mountain near who-ville. where else?
"The Grinch" is his only known name. He is sometimes called "Mr Grinch". Which may imply that "Grinch" is a surname. If it is, we actually are not told his full name.
The name of the dog is Max the Dog .
Grinch!
the dogs name is Max
Max is the name of the Grinch's dog .
Well if he's Mr. Grinch, wouldn't that be his last name?
In How the Grinch Stole Christmas! they were "The Whos" .
the grinch stole christmas