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Harald III is historically attested to have referred only to his kinship with his maternal half-brother, Olaf II. Much later legends (sagas authored under the patronage of royal courts of Harald III's descendants) claim Harald III's father also to have descended from Harald I (through Harald Fairhair's alleged son Sigurd Hrise). Thus, Harald III's 'Hardrada dynasty' is represented in the sagas as a branch of the Fairhair dynasty. They also became known as the 'St. Olaf dynasty' in honor of the founder's half-brother.