"Jacob, b. Finland Married Beata Pietala abt 1850. Residence Kevonlahti/Revonlahti?, 1850"
It can be onfirmed from HisKi:
The farmer's son and widower Jacob Samuelson Nahkala in Revonlahti married Beata Zachrisdotter Pietilä from Paavola village on June 7, 1850.
A passport was issued to Jaakko Heikinpoika (that is Henricson) Nahkala b. 1882 in Revonlahti in 1901. He is probably the son of Henrik (Henry) (Jacobson) Nahkala and probably traveled in 1901.
There are several other Nahkala's in the passport and passenger records but their identities ought to be validated with the help of Ellis Island records.
Revonlahti traversed by the river Siikajoki is a neighbor parish of Liminka and Paavola. At http://www.ruukki.fi/revonlahti/tiedot.htm you can see its location. Replies: