- Born: Abt 903, , , Sweden
- Died: 985-986, Fyrisval, Uppsala, Sweden
Other names for Styrbjorn were Strayborn, STARKE and "The Strong".
Ancestral File Number: 8HJ6-RQ. User ID: 9681767616.
Kings and Queens of Great Britain, Genealogical Chart, Anne Taute and Romilly Squire, Taute, 1990: "Thyra, Daughter of Harald II King of Denmark, Mar =1 Styrbjorn Killed 986 in Battle, =2 Mieszko Duke of Poland Died 992, =3 Olaf Tryggvason King of Norway."
Barber Grandparents: 125 Kings, 143 Generations, Ted Butler Bernard and Gertrude Barber Bernard, 1978, McKinney TX, p80: "322X Strayborn Starke, (S of 311, F of 337); defeated by his Uncle Eric IV, and was never crowned; married Thyra; died in 1017."
Ancestral File Ver 4.13 8HJ6-RQ Styrbjorn STARKE Born Abt 959 Died 985 Son of ?Oloff EDMUNDSSON (AFN:8HJ6-PD), vs <BG Strayborn STARKE Son of Biorn ERICKSSON (AFN:FLHD-L0), Ver 4.19 Styrbjorn OLAFSSON Born Abt 903.
Styrbjorn married Princess Thyra Haraldsdatter DENMARK, daughter of King Harold Blatand DENMARK, I and Queen Gyrithe Olafsdotter DENMARK. (Princess Thyra Haraldsdatter DENMARK was born about 947 in , , Denmark and died about 18 Sep 1000 in , , Norway.)