Need info on Grandmother's father's family please

Grandma's grandfather's name: Ole Kleven Olson. According to notes written by my grandma he was born in Gran-Prestejield, Hadeland, Norway, Married Annie Gilbertson also born in Hadeland, Norway (grandma said). They were married in Norway and migrated to the use in a sailship in 1861 (not positive in year of immigration is correct). No birth dates for either of them and no date for marriage either. Thanks Terri Jo