where does the name skolrood come from

my great great grandfather mikal c (as it is listed on ships manifest) with his wife anne marie ilsdatter sons christien mikalsen ole mikalsen hans mikalsen daughter christiane son martin(my great grandfather daughter anne mikalsdatter left norway on the anna delius apr.28 1866 and arrived in quebec where they then journeyed to lafayette county, gratiot village ,. wisconsin, u s a. they changed their name to skolrood. any ideas as to how they got that name? maxine williams