Frigg is mentioned throughout the "Poetic Edda", compiled in the 13th century by Snorri Sturluson. According to Snorri Sturluson's "Prose Edda", axes were often named after she-trolls. The "Poetic Edda" identifies Sigurd as a king of the Franks. Naglfar is attested in both the "Poetic Edda" and the "Prose Edda". The most important sources are the Prose Edda and the Poetic Edda. Of particular importance is the Poetic Edda. Freyr is mentioned in several of the poems in the "Poetic Edda". Moreover Sindri is a dwarf in one of the manuscripts of the "Prose Edda". An incident between Thor and the giant Skrymir in the "Prose Edda" of ca. What poems are included in an edition of the "Poetic Edda" depends on the editor. In the "Prose Edda", "Naglfar" is mentioned four times. In chapter 53, Hel is mentioned a final time in the "Prose Edda". The event is described primarily in the "Poetic Edda". Late Rabbit Edda remained active until 2010. There are several hypotheses concerning the origins of the word "edda".