You are right. The proof that Guttorm Jonsen Gulsvik was son of Jon (Helgesen Gulsvik)
It is a lot of info on Jon Helgesen Gulsvik, like; As his father (Helge) Jon was the priests assistent. March 9. 1575 he received receipt for the church accounts from 1558-63.
No, but probably ancestors of a friend who asked for some help with his ancestral search. All of my ancestor come from Agder with some offshoots into Rogaland and Stavanger.