In skaldic poetry Geri and Freki are used as common nouns for "wolf" in chapter 58 of Skáldskaparmál (quoted in works by the skalds Þjóðólfr of Hvinir and Egill Skallagrímsson) and Geri is again used as a common noun for "wolf" in chapter 64 of the Prose Edda book Háttatal.
The text is important, among other things, because it constitutes (in Latin translation) an independent version of Þjóðólfr of Hvinir's Ynglingatal besides the text in Ynglinga saga in the Heimskringla.
In chapter 23, a quote by a work from the skald Þjóðólfr of Hvinir is provided that refers to Thor as "Meili's brother".