Juan Marquez son of Diego Márquez, the major accomplice in the death of Governor Rosas. Who was beheaded in 1643. Juan is his mistizo illegitimate son, Juan Márquez, 36 years old in 1639-40, an alferez and treasurer of the Holy Crusade. He was said to have been murdered by orders of Governor Rosas, which accounts for Diego’s part in the Rosas Murder. His murder may have been one of the reasons for the assassination of Gov. Rosas. He apparently was related to co-conspirators Cristóbal Enriques, who was also executed, and Agustín Carvajal.