Looking for ancestors of my g-grandfather Otto Petersen who left Denmark and settled in MN. The family kept in contact with his relatives until WWII. I am trying to locate anyone with connections to his siblings and their descendants in Denmark. Sister Kristine md Hans Peter Corneliusen, brother Hans Christian Petersen md Anna Sophia Sorensen, sister Dorthea md Ole Jacobsen then Hans Michael Christian Lindemark, sister Thora Sophie married Anthon Thomsen. All lived around Copenhagen. Any help or leads would be appreciated