Dates really do make a difference when looking for the RIGHT combination of people.
By the way, if Lars's father was Botolf Hansen, then he would be Lars Botolfsen (more than likely).
I believe you will find some interesting information if you place the following into Google........
Haagenstad OR Hågenstad OR Haakenstad OR Håkenstad "oppland norway"
Have a nice day!
Clark in Japan