Hruso languages
The Hruso languages are a proposed small family of Sino-Tibetan languages of India. They are Hruso (Aka) and Dhammai (Miji). However, Blench and Post (2011) suspect both are language isolates.
References
George van Driem (2001) Languages of the Himalayas: An Ethnolinguistic Handbook of the Greater Himalayan Region. Brill.