Árni Lárentíusson (or Laurentiusson) is one of the few medieval Icelandic prose writers known by name, known to have translated . Árni was born in 1304, the son of Lárentíus Kálfsson and his Norwegian concubine Þuríðr Árnadóttir af Borgundi. His biography is known largely from Einarr Hafliðason's biography of Lárentíus, Laurentius saga. After spending his childhood in Norway, Árni joined his father in Icelandic in 1315 and in 1317, Árni and his father became monks at the monastery of Þingeyraklaustur, alongside the translator Bergr Sokkason, whose prose style seems to have influenced Árni's. Árni was consecrated by Jón Halldórsson, bishop of Skálholt, around 1325, and subsequently worked for his father, who by then was the bishop of Hólar. After this point, Árni's biography becomes obscure