Genealogy services are available in Ada at the Chickasaw Nation Culture and Humanities Building, 1020 N. Mississippi Ave., and in Sulphur at the Chickasaw Cultural Center, Holisso: The Center for Study of Chickasaw History and Culture, 867 Charles F Cooper Memorial Dr. Using the Dawes Rolls records, federal census records, historical records and family files, the Chickasaw Nation Genealogy Program can assist with genealogy requests pertaining to the Five Civilized Tribes (Chickasaw, Cherokee, Choctaw, Creek, and Seminole).