Interactive tree of Swietoslava (Sygryda) (Gunhild) Poland [Queen of Sweden

Waltheof Earl of Northumberland [Earl of Hunting 1042–1076

Judith of Boulogne [Countess of Hun 1054–

Siward Biornsson Earl Northumberland 1012–1055

Aelfled (Elfleda) of Bernicia [Countess of Nor 1016–

Biorn (Bjorn) Ulsiusson (Estri 990–1045

Estrid Svendsdatter Princess Denmark 967–

Ulf Thorgilsson 967–1027

Swietoslava (Sygryda) (Gunhild) Poland [Queen of Sweden 970–1014

Svend I Tveskaeg Denmark And of N 965–1014