Hallvarðr (Hallv) is an obscure figure, and the poem edited here is his only extant work. In Skáldatal he is listed once, amongst Knútr Sveinsson’s (r. 1017-35) poets (SnE 1848-87, III, 258, 267, 282), and he also appears to be mentioned only once in saga-sources, namely in Tóm’s account of Knútr’s attempt to recruit Þormóðr Kolbrúnarskáld to his service (ÓH 1941, II, 803): Þormodr þackade honum fyrer bodit. enn kuozt eigi fær til ath ganga j stad haufud skalldanna er uerit haufdu med Knuti konungi. Þorarins loftungu eda Halluardz eda Ottars eda Sighuatz ‘Þormóðr thanked him for the invitation, but he said he was not able to take the place of the chief poets who had been with King Knútr, Þórarinn loftunga or Hallvarðr or Óttarr or Sigvatr’. The significance of Hallvarðr’s nickname, which is attributed to him in ÓH (1941, I, 477), Hkr (ÍF 27, 311) and Knýtl (ÍF 35, 103), is unclear: blesi means ‘blaze (on a horse’s head)’, but who Hárekr was, and why Hallvarðr should be ‘Hárekr’s blaze’, is unknown (see Finnur Jónsson 1907, 170, 198).