Reference

Torf-Einarsháttr is named after Einarr, also known as Torf-Einarr or Turf-Einar, because he was a significant figure in the history of the Norse Earls of Orkney. Einarr Rögnvaldsson was known for introducing turf, or peat, as a fuel to the islanders, which is why he earned the nickname "Turf-Einar". His fame as a poet led to the use of his name for a specific type of poetic meter in Old Norse poetry, as mentioned in the Háttatal, an examination of Old Norse poetry written in the thirteenth century. This connection between Einarr and the poetic meter is what led to the naming of Torf-Einarsháttr after him. The practice of using his name for the meter predates the Norse, and the real reason for the nickname remains unknown, but it is clear that Einarr's influence extended beyond his rule and into the realm of poetry and literature. For more detailed information, you can refer to sources like Wikipedia and The Skaldic Project.