Kristoffer Nitter Thomason Kjorlaug

On a family tree hand written by my mother (Dorothy Kjorlaug Cummings), Thomas Kristofferson Nitter of Kjorlaug is the father of 8 children. These 8 children are written as Kjorlaug Farm, Hauge Farm, Sirggum (Swiggo) Farm, Fet Farm, Marheim Farm, Heltne Farm, Ollegaard, and Bsita (Brita?). We are unsure if the surname is Kjorlaug for all of these Farms or if the name of the Farm is the surname.

Per Note by Dorothy Kjorlaug Cummings: Kristoffer Nitter Thomason Kjorlaug had 9 or 11 children. 9 are listed on this note in this birth order. 1. Thomas Christopherson 2. Peter Hjermon Christopherson 3. Sonneva 4. Ollegaard 5. Karen 6. Dorothea 7.Peter Von Krog Hess 8. Kristoffer Nitter Kristofferson Kjorlaug 9. Ola. But when I entered the dates from Dorothy's notes, the birth order did not work out as she had numbered them. She seemed confident on the birth order so I'm thinking some dates are wrong (specifically Peter Von Krog Hess seems wrong)