It's origin and it's form are officially unknown because no Pelasgian literature examples survived.
A Bulgarian linguist suggested that the Pelasgians were speaking Thracian. In addition he suggested that the Pelasgians were a sub group of the mysterious late Bronze Age Sea Peoples that caused chaos in the Mediterranean and attacked several cities in the Aegean Sea. This theory has been rejected by most researchers.
During the 19th Century an Austrian diplomat and Albanian speaker suggested a connection between Early Albanian and Pelasgian. Similar claims have been made by modern Albanian nationalistic organizations. This type of theories have been rejected by modern scholars  
- "Encyclopedia Britannica". Encyclopedia Britannica. Retrieved 2021-02-19.
- Herodotus (1907). Histories. Ancient Greece.
- Harrison. 1998. pp. 25–26.
- Finkelberg, Margalit (5th of January 2006). Greeks and Pre-Greeks. Cambridge University Press. Check date values in:
- Le Pélasgique. University of Louvain. 1952.
- J. Windekens, Albert (1960). "Études Pélasgiques". Cite journal requires