Question: how cdo got its name?
Answer: The name Cagayan de Oro (lit. River of Gold) can be traced back to the arrival of the Spanish Augustinian Recollect friars in 1622, the area around Himologan (now Huluga), was already known as "Cagayán". ... It was then former Vice President of the Philippines Emmanuel Peláez who appended de Oro to Cagayan.