Halfdan

To me there appaers some misunderstanding about the identity of Harald Klak Halfdansson or see in Geni. Harald Klak Haraldsson (800-844 or 852) is in the Dutch Wikipedia indirectly mentioned as nephew of king Gudfred, so a sun of a brother Hafdan. But if we compare this with this point of view Harald Klak's father Halfdan, is not the son of Sigrid but he descent from Harald Eysteinsson.