A vast alphabetical collection of biographical information concerning the early settlers of Arizona is Carl Hayden, Carl Hayden Biographical Files, ca. 1825-1927 (Tempe, Arizona: Arizona State University, 19–?; FHL films 1000464-78). This is at the Hayden Library of Arizona State University at Tempe and at the Family History Library. Internet: http://www.asu.edu/lib/libraries/hayden/
Two representative biographical encyclopedias for Arizona are:
Portrait and Biographical Record of Arizona. Chicago, Illinois: Chapman Publishing Company, 1901. (FHL film 934828.) Has a separately published index (FHL film 1321068 item 11).
Conners, Jo. Who's Who in Arizona. Tucson, Arizona: S.n., 1913. (FHL book 979.1 D3c; film 934828 item 2.)
A biographical index to several statewide and regional histories of Arizona is Marvin E. Wiggins, Mormons and Their Neighbors: An Index of Over 75,000 Biographical Sketches from 1820 to the Present, Two Volumes. (Provo, Utah: Brigham Young University, 1984; FHL book 978 D32w).