[2] arfi Haralds ‘heir of Haraldr [= Óláfr]’: The reference is most likely to be to Óláfr’s father Haraldr grenski ‘from Grenland’, though a claim of descent from Haraldr hárfagri (so Jón Skaptason 1983, 321) is also possible; cf. Note to Sigv Knútdr 3/2, 3.