Hän is a Na-Déné language of the Northern-Athapaskan sub-group. It is spoken in Dawson City, Yukon, Eagle and Fairbanks, Alaska by about 10 people, who call themselves Hän Hwëch'in or 'people who live along the (Yukon) River'. Hän is closely related to Gwich’in and Upper Tanana.
A writing system was established for Hän in the 1970s.
source
wikipedia.org, omniglot.com & ethnologue.comolder brothers