Why do Unangan people use the name Unangam Tunuu for the Aleut language?

The Unangan people use the name Unangam Tunuu for their language because it is their own self-name for the tongue.12

The term "Aleut," by which the language is commonly known in English, is not an indigenous name; rather, it is an exonym introduced by Russian colonizers who encountered the people in the 18th century. Similarly, the people refer to themselves as Unangan (or Unangas) rather than Aleut. Using the name Unangam Tunuu is a way for the community to honor their heritage and linguistic identity, distinguishing it from the labels imposed by foreign powers during the period of Russian colonization.312