sentences:  "Naglfar" is attested in the "Poetic Edda", compiled in the 13th century from earlier traditional sources, and the "Prose Edda", written in the 13th century by Snorri Sturluson.The boat itself has been connected by scholars with a larger pattern of ritual hair and nail disposal among Indo-Europeans, stemming from Proto-Indo-European custom, and it may be depicted on the Tullstorp Runestone in Scania, Sweden.Some dispute has waged over the etymology of "Naglfar".