1. Juan de Oñate: A Spanish explorer who is credited with being the first European to explore Arizona. He led an expedition in 1598 that traveled through present-day New Mexico and Arizona, reaching as far as the Grand Canyon.
2. Francisco Vázquez de Coronado: Another Spanish explorer who explored Arizona in the 16th century. He led an expedition in 1540-1542 that searched for the legendary Seven Cities of Gold. Although he did not find the cities, he did explore much of the American Southwest, including Arizona.
3. James Ohio Pattie: An American explorer and fur trapper who explored Arizona in the early 19th century. He was one of the first Americans to travel through the Gila River Valley and the Grand Canyon region.
4. John C. Frémont: An American explorer and military officer who explored Arizona in the 1840s. He led several expeditions that mapped the region and helped to open it up for settlement.
5. Edward F. Beale: An American explorer and military officer who explored Arizona in the 1850s. He led an expedition that surveyed a route for a transcontinental railroad through the region.
6. John Wesley Powell: An American explorer and geologist who explored Arizona in the 1860s and 1870s. He led several expeditions that explored the Grand Canyon and other parts of the region.
7. Sylvester Mowry: An American explorer and surveyor who explored Arizona in the late 19th century. He was one of the first people to explore the Petrified Forest National Park and the Painted Desert.
8. William John McGee: An American geologist and anthropologist who explored Arizona in the late 19th century. He was one of the first people to study the Hohokam culture, an ancient Native American civilization that lived in Arizona.
9. Edgar Lee Hewett: An American archaeologist and anthropologist who explored Arizona in the early 20th century. He was the founder of the School of American Research in Santa Fe, New Mexico, and he did extensive research on the ancient ruins of Arizona.
10. Florence Colgate: An American botanist & archeologist who lived during the late 19th century. Known for her studies on cacti and her archaeological work in Arizona, including the excavation of ruins in the Canyon de Chelly area.