Refers to North American Indians culture of a language group that encompasses many linguistic sub-groups and cultural groups. It is an arbitrary term derived from Lake Athabaska by Albert Gallatin in 1836 to refer to a culture that he believed were centered around this area. People belonging to the Athapaskan language group occupy vast areas of the subarctic region as well as areas in New Mexico and Arizona. Spelling of the term varies widely, and often appears in multiple forms in a single source. 'Athapaskan' has been in general use since 1930. 'Dene' or 'Na-Dené' is the self-determined descriptive term used by this group, and is sometimes used synonymously with Athapaska, though is also used to describe a larger category that includes Tlingit and Haida language groups.