I am married to a Rohrbaugh and our 7 yr old daughter is named after Mike's greatgrandmother Rachael Rohrbaugh. All we really know is she came from PA we believe with 9 children across the prairie in a covered wagon.Mikes Fathers name was Donald Rolfs Rohrbaugh and he was born in 1916.He was from the Idaho /Washington state area. Thank you for any help.