Q: Name a famous person whose first and last names together contain four doubled letters — all four of these being different letters of the alphabet. Who is it? For example, Buddy Holly's name has two doubled letters, D and L.So it would seem that nicknames like "Buddy" are okay if that is what the person was most known by. I have the answer but not before trying to make Annette Funicello and Isabella Rossellini work. Did you know her full name was Isabella Fiorella Elettra Giovanna Rossellini? That was interesting to find out.
Edit: The last sentence starts "That was..." which has the initials T.W. from my answer.
A: TENNESSEE WILLIAMS