Alejandro O'Reilly
…family. His wife, Doña Rosa de Las Casas, was the sister of Luis de Las Casas, who served as governor of Cuba in the 1790s. O'Reilly was an uncle of Juan MacKenna, a hero of the Chilean War of Independence, as well as a cousin of Hugo Oconór, the founder of Tucson, Arizona, governor of Spanish Texas in the late…