Rolla Farm - Hedmark, town of Hof

My family originated in Norway, on a farm named Rolla located in Hedmark, on the eastern side of the country bordering Sweden, in a little town named Hof, across the river from Flisa. It is situated in the wooded hills to the west of the Glomma river. My great great grandfather arrived in the USA with his little family. His name was Oluf Christiansen however he added Rolla, the name of the farm where he was born. I am interested in the family home, would like to locate the church, identify correct spelling of names so that I can begin searching for more records. Maybe come in contact with other members who had ancestors in this part of Norway. Any help is appreciated.