Harold Klak & Sigrid Helgisdottir 
They had a son and a daughter, named Gottfried and <Unknown>.
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Personal Details
Harold Klak
Harold was born in Jutland, Denmark.1 He died about 0852 in Walcheran Island, Netherlands.1
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Children
Gottfried Haithabu Haraldsson
Gottfried was born about 0820 in Haithabu, Schleswig-Holstein, Germany.2 He died in June 0885 in Rustringen, Friesland, Netherlands.2
<Unknown>
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=char2jay&id=I7229&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=char2jay&id=I51179
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=char2jay&id=I51179