One Piece Chapter 1146 reveals that Brook knows about the Hoy Knights. During the encounter with the Straw Hats, Nami, Brook, Jinbe, and Usopp with Gunko, a member of the God Knights.

Though Gunko attacked the ship carrying Collun, Nami, Jinbe, Usopp, and Brook in the previous chapter, Chapter 1147 of One Piece finally sees Gunko notice and address Brook. That said, Gunko’s ...

One Piece Foreshadowed a Second Brook Backstory in Chapter 489. In the final chapter of the Thriller Bark Arc, 489, Brook made a formal introduction to the Straw Hat Pirates before joining their crew.