Malana is an ancient Indian village in the state of Himachal Pradesh.
You can read more in Wiki page.
It is believed that the people live there are descendants of Greek soldiers of Alexander's army.
The above claim is mentioned in almost every web page that mentions Malana.
Some examples:
Are there any historical or archaeological studies done on this claim?
"The Ethnological and Historical Enigma-The Malanese People of Kulu Valley." The Oriental Anthropologist (2016) vol. 16 :
It has been emphasized before that though the Greek origin theory of Malanis mentioned above caters only to popular appeal, with a few words of 'Kanashi', physical features of the people and the bicameral political structure present in Malana appearing to be of Greek provenance, recent genetic-typing of the Malani population is more consistent with an Indo-Aryan origin.
See also The Most Ancient Democracy in the World is a Genetic Isolate: An Autosomal and Y-Chromosome Study of the Hermit Village of Malana (Himachal Pradesh, India) Human Biology (2010) vol. 2, pages 123-141
