? on new GOF photos in EW

[verosomm]

Well, I was just on Leaky and Mugglenet, and they both have links to 
photos from the "out today" issue of Entertainment Weekly.  My ? is, 
if any of you have seen the photos as well, is "What's up with the 
tombstone in the graveyard?"  

slight spoiler to Book 6 ahead...


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The grave marker in the photo clearly says "Tom Marvolo Riddle."  In 
Book 6, the orphanage keeper clearly tells Dumbledore that Merope 
told them the baby's name was to be Tom Riddle, after his father, 
with a middle name of Marvolo, after her father.  So I was under the 
impression that Tom Riddle, Sr. did NOT have the middle name 
Marvolo.  Any other thoughts on this or is it just a movie Flint (as 
the movie was made before the book came out and in Book 2 we are 
given the impression, from Tom himself, that he was named after his 
Muggle father, so most of us assumed, I think, that he was named 
exactly like his father.)?

Veronica