Komninades (Greek: Κομνηνάδες, before 1927: Σιάκι – Siaki;[2] Albanian: Shag)[3] is a village in Kastoria Regional Unit, Western Macedonia, Greece.

Siaki was populated by Albanian speaking Muslim inhabitants and they used to intermarry with the nearby Muslim villages of Menkulas, Vidohovë and Miras (now in Albania).

[4][3] The 1920 Greek census recorded 690 people in the village, and 683 inhabitants (95 families) were Muslim in 1923.

[3] Greek refugee families in Siaki were from Pontus (69) in 1926.

[5] After the population exchange, the site where the village mosque stood was replaced by the present church, the Assumption of the Virgin, built in 1931.