This section contains a file compiled by Oddvin Ylvisaker of Sogndal, a great grandson of Nils Torbjorn's brother Ola. It provides ancestry details dating to the sixteenth century.

This section highlights two files containing information on descendants in the Ylvisaker family tree.

The first was compiled by Oddvin Ylvisaker of Sogndal, a great grandson of Nils Torbjorn's brother Ola.

The second was compiled by Mary Ylvisaker Cannons, a great granddaughter of Nils Torbjorn.