The 1931 famiily tree chart from Norway shows a Gutorm Ivarsson and also a Gutorm Ivarson. They are clearly the same person, although for reasons of space and layout, they are placed far from each other on this crowded chart. Each has one child, a daughter shown as “N.N.” Here and elsewhere on this chart, “N.N.” seems to signify “name unknown.”

The two “N. N,” daughters marry different men, however, so they are not the same person. This one has many descendants. The other has a daughter “N.N.” but then a gap of many generations until the next descendants.

There’s no problem with space and layout in this digital genealogy, so I have here listed both daughters under one Gutorm and arbitrarily spelled his name Ivarsson.