Nielsen Hayden genealogy
Ancestors of Thrugot Ulfsen
┌── Ulf
│ ┌── Håkon Sigurdsson (Abt 935 - 995)
│ │ └── Bergljot Thoresdatter =>
│ │
│ ┌── Eirik Håkonsson (Abt 964 - Abt 1023)(m. Abt 996)
│ ┌── Haakon Ericsson (Abt 998 - Abt 1030)(m. Abt 1029)
│ │ │
│ │ │ ┌── Harald Bluetooth, King of Denmark and Norway (Abt 910 - Abt 986) =>
│ │ │ ┌── Swein Forkbeard, King of England and Denmark (Abt 960 - 3 Feb 1014 Gainsborough,
│ │ │ │ Lincolnshire, England)
│ │ │ │ Lincolnshire, England)
│ │ │ │ └── Gunhild
│ │ │ │
│ │ └── Gyda Svendsdatter (m. Abt 996)
│ │
│
└── Gunhild Burislawsdatter (m. Abt 1029)
│
│ ┌── Gorm the Old, King of Denmark (Abt 875 - Abt 958)
│ ┌── Harald Bluetooth, King of Denmark and Norway (Abt 910 - Abt 986)
│ │ └── Thyra ( - Abt 935)
│ │
└── Tyre Haraldsdatter ( - 18 Sep 1000)
└── Gunhild