Abstract: The article addresses a conflicting encounter of two ideologies of kinship, ‘natural’ and ‘religious’, among the newly established Evangelical communities of Nenets in the Polar Ural and Yamal tundra. An ideology of Christian kinship, as an outcome of ‘spiritual re-birth’, was introduced through Nenets religious conversion. The article argues that although the born-again experience often turned against ancestral traditions and Nenets traditional kinship ties, the Nenets kinship system became a platform upon which the conversion mechanism was furthered and determined in the Nenets tundra. The article examines missionary initiatives and Nenets religiosity as kin-based activities, the outcome of which was twofold. On one side, it was the realignment of Nenets traditional kinship networks. On other side, it was the indigenisation of the Christian concept of kinship according to native internal cultural logic. Evangelical communities in the tundra were plunged into the traditional practices of Nenets kinship networks, economic exchanges, and marriage alliances. Through negotiation of traditional Nenets kinship and Christian kinship, converted Nenets developed new imaginaries, new forms of exchanges, and even new forms of mobility.