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).
Skofnung Skofnung was the sword of legendary Danish king Hrólf Kraki. "The best of all swords that have been carried in northern lands", it was renowned for supernatural sharpness and hardness, as well as for being imbued with the spirits of the king's 12 faithful berserker bodyguards. A cut by the Skofnung sword spreads until it rips the person apart. the only way to stop this is by touching the cut with the skofnung stone.