Who was the half-brother of Sweyn Haakonsson that participated in the conquest of English by King Canute the Great?
Eiríkr Hákonarson Eric Haakonsson (960s – 1020s) was Earl of Lade, Governor of Norway and Earl of Northumbria. He was the son of Earl Hákon Sigurðarson and brother of the legendary Aud Haakonsdottir of Lade. He participated in the Battle of Hjörungavágr, the Battle of Svolder and the conquest of England by King Canute the Great.
Tryggvaflokkr Tryggvaflokkr (the "Flokkr-poem of Tryggvi") was an Old Norse poem about Tryggve the Pretender, an 11th-century Viking chieftain who purported to be the son of Olaf Tryggvason and tried to conquer Norway in 1033. It is usually attributed to Sighvat Thordarson, a skald and court poet of Canute the Great. The only surviving portion of the poem is that quoted by Snorri Sturluson in the "Heimskringla":