How was Fridlevus II related to Halfdan?
Fridlevus II Fridleif (Ynglinga saga) was a son of Fróði of the Skjöldung (Scylding) lineage. In that work he was the brother of Halfdan and the father of Áli the Strong.
Bruno II Bruno II (1024–1057) was a Frisian count or margrave in the 11th century ruling Middle-Friesland. He belonged to the Brunonen family. In 1038 he succeeded his father Liudolf, Margrave of Frisia. His mother was Gertrude the daughter of Count Hugo and brother of Pope Leo IX. When he was killed in 1057 in an encounter with William of Brandenburg, he was succeeded by his brother Egbert.