All the Nukala-names that I found where located in Ostrobothnia, Finland...
In South Ostrobothnia; Isokyrö:
Married in 1811 (village Ylihärmä):
Abraham Nukala and Susanna Thomasdr.
These people moved to America:
Amalia Nukala, born 1874, homeparish: Alahärmä, and Matts Nukala, born 1880 in Alahärmä, and Kaapo Nukala from Alahärmä, Vaasa.
I´m not so sure about Navala anymore, but if you are interested, I think it´s in Southern Finland.