Uralic–Yukaghir hypothesis
Uralic–Yukaghir, also known as Uralo-Yukaghir, is a hypothetical proposed language family composed of Uralic and Yukaghir. Uralic is a large and diverse family of languages spoken in northern and eastern Europe and northwestern Siberia.
Source: Wikipedia — Uralic–Yukaghir hypothesis (CC BY-SA 4.0)