Giorgos Giannias (Greek: Γιώργος Γιαννιάς, d. June 13, 1821 near Koumani) was a Greek revolutionary leader born in Prostovitsa, a village now known as Drosia in Achaia.
In March 1821, he entered as one of the first in the revolution with a small strategic army.
Many folk music brought into his heroic battle.
Next to the location in which the battle of Antroni (Spartoulia - Σπαρτουλιά) in which had a memory in honor of him.
In one view of the Lalians in Koumani brought in 100 man in front of a large spot of the Turks, many commanders fled the area.