The Finngreek language is constructed from etymological proposals made between Greek, Finnish, and the other Uralic languages, in a discipline referred to as Helleno-Uralic theory. This theory’s premise is that early Hellenic and Uralic speakers were involved in a contact period, during which Hellenic vocabulary was extensively loaned into the Uralic languages. The hypothetical timespan for this contact period would be sometime between 1,500 and 500 BC.
The primary candidate considered for the Proto-Uralic speakers who were in contact with early Greeks is the Hyperboreans, a semi-mythical people associated with spiritual sites in archaic Greece, and renowned for their worship of Apollo/Phoibos/Φοίβος. The Hyperboreans are proposed to be of Uralic origin due to a significant number of terms in Finngreek that may pertain to religious rites of the ancient Greeks.
There is currently no definitive anthropological evidence that Uralic and Hellenic peoples shared an exclusive contact period. However, contact is reasoned through phonological and semantic parallels which are not found in other Indo-European languages.
These proposals are made to help improve Hellenic and Uralic etymologies, and to open the discussion for the potential of Helleno-Uralic contact.
All proposals are tentative, pending further research and peer review.