From the 1960s Gilligan's Island character Thurston Howell III.
Thurston Howell III was a self involved millionaire stranded on the Island with the other castaways.
For a pet who likes to use their vocal chords or drink alot. Also, for one that is similar in disposition to its namesake, that is self involved and having expensive tastes.
TELL US ABOUT YOUR PET, AND WHY THEIR NAME SUITS THEM!