Ynglingatal or Ynglinga tal (Old Norse: 'Enumeration of the Ynglingar') is a Skaldic poem cited by Snorri Sturluson in the Ynglinga saga, the first saga of Snorri's Heimskringla. Þjóðólfr of Hvinir (Thjodolf), who was a poet for Harald Fairhair (r. 872–930), is traditionally credited with its authorship. Snorri quotes frequently from this poem and cites it as one of the sources of the saga. The composition of the poem is dated to the 9th century. The poem lists the partly mythical and partly historical ancient Swedish kings; twenty-seven of whom are mentioned in the poem, along with details about their deaths and burial places. The title Ynglingatal alludes to Yngling, who had the name Yngve-Frey—another name for Frey, the god who was worshipped in Sweden. Yngling allegedly descended from Frey's son Fjölnir. Snorri portrayed Harald Fairhair as a descendant of the Ynglings. The poem was written on behalf of Ragnvald the Mountain-High, a cousin of King Harald Fairhair, and its last stanza is about Ragnvald. Verse forms and text history Ynglingatal is composed in kviðuháttr (modern Norwegian kviduhått); this genealogical verse form is also used in Son loss (Sonatorrek) in Egils saga. In this form of verse, the lines alternate between three and four syllables—the first line has three syllables, the next has four, the next three, and so on. For example: Ok Vísburs vilja byrði sævar niðr svelgja knátti, [...] ‘And the kinsman of the sea [FIRE] swallowed the ship of the will [BREAST] of Vísburr [...]’ Ynglingatal has also makes extensive use of acquaintance, such as rewriting and metaphors that give life to the poem, which otherwise contains much litany. The Icelandic philologist Finnur Jónsson believed the eight-line stanza defines Ynglingatal'''s structure, while Walter Akerlund believed the four-line helming—the half-stanza as in the example above—defines the poem's structure. Akerlund has also said the bard Thjodolf learned the verse-form kviðuháttr by studying the Rök runestone in present-day Sweden, which dates from around the year 800. The Ynglings in other sources Ynglingatal is preserved in its entirety in Snorri's Ynglinga saga, which Snorri wrote based on the poem. In the saga, Snorri expanded his text by quoting from the poem in addition to his own text. A stanza from Ynglingatal is also quoted in Þáttr Ólafs Geirstaða Alfs. Stories that build on the poem are found in the Norwegian history, Historia Norvegiæ, which was written in Latin in the late