User blog comment:Brocodile/X Dory/@comment-25614690-20141113134309/@comment-5115277-20141113162439

Not necessarily... Doflamingo is just called "Doffy" by the exec officers for example, not Doffy-kun or any other honorific.

Besides, given how beaten up he was I don't think Barrels or any of the other pirates would have respected him to add the -kun anyway.