The Luffy family of One Piece was widely regarded as one of the strongest pirate families in history because they had a series of powerful abilities and characteristics. Luffy and his family members had strong combat ability and intelligence. They were good at using various weapons and tactics, and often took risks to obtain powerful strength and skills. However, the history text did not record whether the Luffy family was the strongest pirate family in history because it depended on the history and standards described. The story of One Piece was a fictional world, and the abilities and behavior of the Luffy family were also influenced by the author and editor. Therefore, there was no definite answer to the question of whether the Luffy family was the strongest pirate family in history.