Devil. It stands for Devil. They the people with the initial are enemies of God/World Nobles. The devil is god's enemy.
Just posting this for people who haven't thought of it.
I think D stands for destiny. All people with D chose their own destiny out of their free will
D stands for nothing untill Oda explains it. It can stand for dildo for all we know
Ducis... that was great creativity there man!! :D
What if the D stand for Demi- god.. It doest have to be a devil..
Dude, the year 2000 called, they want their theory back and also if anything bad is going to happen regarding Iraq just leave a message at the World Trade Center.
First, I believe it's stands for descendants but I saw an amazing prediction about this that is explained well and has a chance to be true, it push me to believe that D stands for Doragon in Japanese which means Dragon.
What do you think?