Which legendary danish King had a clan called Skjöldungs?
Hrólfr Kraki Hrólfr Kraki, "Hroðulf", "Rolfo", "Roluo", "Rolf Krage" (early 6th century) was a legendary Danish king who appears in both Anglo-Saxon and Scandinavian tradition. His name would in his own language (Proto-Norse) have been *"Hrōþiwulfaz" (famous wolf).
Óláfs saga helga Óláfs saga helga or the Saga of St. Olaf, written in several versions, is one of kings' sagas ("konunga sǫgur") on the subject of King Olaf Haraldsson the Saint.