The Lykov family (Russian: Лыкoв) was a Russian family of Old Believers.[1] The family of six is known for spending 42 years in complete isolation from human society in an otherwise uninhabited upland of Abakan Range, in Tashtypsky District of Khakassia (southern Siberia). Since 1988, only one daughter, Agafia, survives.
Their story became well known following the 1994 publication of Lost in the Taiga: One Russian Family's Fifty-Year Struggle for Survival and Religious Freedom in the Siberian Wilderness by journalist Vasily Peskov.
https://en.wikipedia.org/wiki/Lykov_family 