|Freyr tók þá ríki eptir Njörð; var hann kallaðr dróttinn yfir Svíum ok tók skattgjafir af þeim; hann var vinsæll ok ársæll sem faðir hans. Freyr reisti at Uppsölum hof mikit, ok setti þar höfuðstað sinn; lagði þar til allar skyldir sínar, lönd ok lausa aura; þá hófst Uppsala auðr, ok hefir haldizt æ síðan. Á hans dögum hófst Fróða friðr, þá var ok ár um öll lönd; kendu Svíar þat Frey. Var hann því meir dýrkaðr en önnur goðin, sem á hans dögum varð landsfólkit auðgara en fyrr af friðinum ok ári. Gerðr Gýmis dóttir hét kona hans; sonr þeirra hét Fjölnir.||Frey took the kingdom after Njord, and was called drot by the Swedes, and they paid taxes to him. He was, like his father, fortunate in friends and in good seasons. Frey built a great temple at Upsal, made it his chief seat, and gave it all his taxes, his land, and goods. Then began the Upsal domains, which have remained ever since. Then began in his days the Frode- peace; and then there were good seasons, in all the land, which the Swedes ascribed to Frey, so that he was more worshipped than the other gods, as the people became much richer in his days by reason of the peace and good seasons. His wife was called Gerd, daughter of Gymis, and their son was called Fjolne.|
|Fjölnir, son Yngvifreys, réð þá fyrir Svíum ok Uppsala auð; hann var ríkr ok ársæll ok friðsæll. Þá var Friðfróði at Hleiðru; þeirra í millum var heimboð ok vingan. Þá er Fjölnir fór til Fróða á Selund, þá var þar fyrir búin veizla mikil ok boðit til víða um lönd. Fróði átti mikinn húsabœ; þar var gert ker mikit margra alna hátt, ok okat með stórum timbrstokkum; þat stóð í undirskemmu, en lopt var yfir uppi, ok opit gólfþilit, svá at þar var niðr hellt leginum, en kerit blandit fult mjaðar; þar var drykkr furðu sterkr. Um kveldit var Fjölni fylgt til herbergis í hit næsta lopt, ok hans sveit með honum. Um nóttina gékk hann út í svalir at leita sér staðar, var hann svefnœrr ok dauðadrukkinn. En er hann snerist aptr til herbergis, þá gékk hann fram eptir svölunum ok til annarra loptdura ok þar inn, missti þá fótum ok féll í mjaðarkerit, ok týndist þar.||Fjolne, Yngve Frey's son, ruled thereafter over the Swedes and the Upsal domains. He was powerful, and lucky in seasons and in holding the peace. Fredfrode ruled then in Leidre, and between them there was great friendship and visiting. Once when Fjolne went to Frode in Sealand, a great feast was prepared for him, and invitations to it were sent all over the country. Frode had a large house, in which there was a great vessel many ells high, and put together of great pieces of timber; and this vessel stood in a lower room. Above it was a loft, in the floor of which was an opening through which liquor was poured into this vessel. The vessel was full of mead, which was excessively strong. In the evening Fjolne, with his attendants, was taken into the adjoining loft to sleep. In the night he went out to the gallery to seek a certain place, and he was very sleepy and exceedingly drunk. As he came back to his room he went along the gallery to the door of another left, went into it, and his foot slipping, he fell into the vessel of mead and was drowned.|
The Historia Norwegiæ provides a Latin summary of Ynglingatal, which precedes Snorri's quotation. It also informs that Fjölnir was the son of Freyr, the father of Svegder and that he drowned in a vat of mead:
|Froyr vero genuit Fiolni, qui in dolio medonis dimersus est, cujus filius Swegthir [...]||Frøy engendered Fjolne, who was drowned in a tun of mead. His son, Sveigde, [...]|
In Gesta Danorum, Book 1, Frodi corresponds to Hadingus and Fjölnir to Hundingus, but the story is a little different. It relates how King Hundingus of Sweden believed a rumor that King Hadingus of Denmark had died and held his obsequies with ceremony, including an enormous vat of ale. Hundingus himself served the ale, but accidentally stumbled and fell into the vat, choked, and drowned. When word of this came to King Hadingus of this unfortunate death, King Hadingus publicly hanged himself (see Freyr).
Dumézil (1973, Appendix I) cites a Faroese ballad recorded in 1840 about Odin and his son Veraldur. It is believed that this Veraldur is related to Fjölnir and Freyr, as per Snorri's statement that Freyr was veraldar goð ("god of the world").
In this ballad Veraldur sets off to Zealand to seek the king's daughter in marriage despite Odin's warnings. The king of Zealand mislikes Veraldur and tricks him into falling into a brewing vat in a "hall of stone" where Veraldur drowns. When Odin hears the news, he decides to die and go to Asgard where his followers will be also be welcomed after death.
The tale is similar to that of the death of Fjölnir, son of Freyr, who accidentally fell into a vat of mead and drowned while paying a friendly visit to Fridfródi the ruler of Zealand.
Fjölnir is also another name for Odin, found in Grímnismál when the god revealed himself to Geirröd, and in Reginsmál when he was standing on a mountain addressing Sigurd and Regin. Snorri also mentions it as an Odinic name in Gylfaginning.