Hallgrímur Pétursson (1614 – 27 October 1674) was an Icelandic poet and a minister at Hvalsneskirkja and Saurbær in Hvalfjörður.

As a young man, he left Hólar for unknown reasons and travelled to mainland Europe, possibly to learn the blacksmith trade.

According to folk legend, Brynjólfur first encountered Hallgrímur by chance when travelling through Glückstadt in the Duchy of Schleswig (then under Danish rule).

On their arrival it emerged that Guðríður's husband had died, leaving her a widow; she and Hallgrímur promptly married and he worked as a labourer for a number of years.

notes, compiled and written in the year 1659"), a collection of fifty hymns to be sung, one for each working day, during the seven weeks of Lent.