His son, Knut Johan Angstrom, was born at Upsala on the 12th of January 1857, and studied at the university of that town from 1877 to 1884.
Jomsvikinga Saga, the history of the pirates of Jom, down to Knut the Great's days, also relates to Danish history.
But his success was short-lived, for in 1029 the Norwegian nobles, seething with discontent, rallied round the invading Knut the Great, and Olaf had to flee to Russia.