Hi!
I do not know if this is the right Jacob, but from the Finnish website Hiski there is a family with the surename Björnström from the Finnish town Uleåborg, who has a boy called Frans Jacob born 1835.
The father wasa seaman

Frans Jacob and his sieblings:

22.3.1827 Sjöm: Joh: Björnström/ Greta Lisa 27 Joh: Gust

31.5.1829 Sjöm: Joh: Björnström/ Greta Lisa 29 Henr: Herm:

8.12.1831 Sjöm: Joh: Björnström/ Greta Lisa 31 Anna Maria

24.7.1835 Sjöm: Joh: Björnström/ Greta Lisa 35 Frans Jacob

20.7.1838 Sjöm: Joh. Björnström/ Greta Lisa 38 Fredric

27.2.1841 Sjöm: Joh: Björnström/ Greta Lisa 40 Niclas