Udlesvang is a dialect pronunciation of the name Ullensvang (which means "the meadow of the Norse god Ull"). Ullensvang is a municipality in the county of Hordaland, at the innermost end of the Hardangerfjord (SE of Bergen). The history of the municipality, its farms and their owners is well documented in a "bygdebok" by Aamund Knutsson Bu: Ættar-bok for Udlesvang (reprint 1988), which you should be able to find at one of the university libraries in Minnesota, Wisconsin or Iowa.
Jon Gunnar Arntzen
Norsk Biografisk Leksikon/Norwegian National Dictionary of Biography