George Strez Balšić

George Strez Balšić (Georgio Stresio) and his brothers Gojko and John were the lords of Misia, a coastal area from the White Drin towards the Adriatic. The brothers were members of the Balšić family, which had earlier held Zeta. They participated in founding of the League of Lezhë, an alliance led by their maternal uncle Skanderbeg. George later betrayed Skanderbeg, by selling a domain to the Ottomans, while his two brothers continued to support Skanderbeg until his death and then continued to fight for the Venetian forces.

Family
According to Fan S. Noli George and his brothers Ivan and Gojko were nephews of Skanderbeg from his sister Jelena who married Pavle Balšić. Genealogy of Kastrioti family written by Karl Hopf does not present the information about George Strez Balšić being a son of Skanderbeg's sister Jelena.

League of Lezhë
The three Balšić brothers joined the League of Lezhë, an alliance formed by their maternal uncle Skanderbeg, after meeting in the St. Nicholas Church in Lezhë on March 2, 1444. The members included Lekë Zaharia, Peter Spani, Lekë Dushmani, Andrea Thopia, Gjergj Arianiti, Theodor Musachi, Stefan Crnojević, and their subjects. Skanderbeg was elected its leader, and commander in chief of its armed forces numbering a total of 8,000 warriors.

In 1451 after Alfonso signed the Treaty of Gaeta with Skanderbeg, he signed similar treaties with George Strez Balšić and other chieftains from Albania: Gjergj Arianiti, Ghin Musachi, Peter Spani, Pal Dukagjini, Thopia Musachi, Peter of Himara, Simon Zanebisha and Carlo Toco.

George was one of noblemen who cancelled their support to Skanderbeg. According to Albanian historians Kristo Frashëri and Fan Noli, Strez Balšić betrayed Skanderbeg by selling the fortress he controlled (Modritza) to the Ottoman Empire in spring of 1457. Hamza Kastrioti deserted Skanderbeg a couple of weeks later.