After searching through my own family. Xan Krohn (Christian Cornelius Krohn) 1882-1959 http://no.wikipedia.org/wiki/Xan_Krohn
His mother: Ingeborg Severine Kristine Krüger (Married first to Conrad Peter Krohn, then to Rosendahl, and from this apperently also a Qualsund) The date of birth and death is the same, also Norway->Chicago.
She is listed as daughter of Hans Christian Severin.
Making it highly likely this is all the same person.
