Monkey is the surname of three known characters:
- Monkey D. Dragon, the leader of the Revolutionary Army, Garp's son and Luffy's father.
- Monkey D. Garp, a vice admiral of the Marines, Dragon's father and Luffy's paternal grandfather.
- Monkey D. Luffy, the main protagonist of the series, captain of the Straw Hat Pirates, Dragon's son and Garp's grandson.
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