Another interesting thing to notice, is that Johan Baski (Barski/Barsk), living at the same place as Isak Tornak in 1865, seems to be a cousin of Isak. Isak's mother, Greta Johansdr Barsk and Johan's father, Henrik Wilhelm Johansson Barsk, were siblings. Their parents were Johan Persson Kyrö-Barsk (b. 1760 in Pello, d. 18 Dec 1833) and Sofia Persdotter (1768-1851).
Here are all siblings:
1. Per *1790
2. Margareta *1792 (Isak Tornak's mother Greta)
3. Johan 1794-1825
4. Sofia 1797-1826
5. Salomon 1798-1827
6. Eva *1804
7. Isak *1805
8. Helena *1810
9. Henrik Vilhelm *1810 (Johan Baski's father)
Source: "SLÄKTEN KYRÖ FRÅN PELLO" by Erik Kuoksu
Johan Barski at the 1875-census in Seida (Tana):
Link