User blog comment:Feroza/Vegapunk's research team: Possible members/@comment-25926617-20160927154410/@comment-27930128-20160928061854

In Little Garden and in Alabasta, Sanji was the only one whose identity was not disclosed to BW. He only introduced himself as Mr Prince. Well Sanji is indeed a prince of Germa and Crocodile never know who is Mr Prince. If Crocodile met Sanji, he might know that Sanji is from Germa and a prince.