I am trying to find where my grand father was born.

Link to the Family Search database: http://www.familysearch.org/eng/default.asp

You can contact The Genealogical Society of Finland and ask them for help in your search. They can give you professional help: http://www.genealogia.fi/indexe.htm

Population Register Center has also interesting database, where you can search for the Finnish names from different periods of time: https://192.49.222.187/nimipalvelu/default.asp?L=3