Kalambaka

The toponym is from the male personal name Metzidies. It stems from the Aromanian meğidié 'one who belongs to the administration of Sultan Abdülmecid' and derives from the Turkish mecidî, in reference to 'that which has been created or established by or during the time of Sultan Abdülmecid'. In Turkish, the village is known as Mecidiye. Another derivation of the toponym links it to terrain or soil from the Aromanian meğidie, meaning 'purple-coloured one'. The new name Kefalovryso means 'headwater' in Greek.

The Aromanians of the area resided at an older settlement named Bitsikopoulo (in modern times the site is called Paliochori, 'old village') at Mt. Nemërçka. The aftermath of the Greek War of Independence caused regional instability, where Bitsikopoulo was destroyed by brigands in 1840 and abandoned by its population. The Aromanians were settled at a village named Metzities in 1853 by Ottoman Sultan Abdülmecid I. In the late 19th century scholar Ioannis Lambridis described the village as newly founded and its population as "mixed" Aromanians with 143 families. Kefalovryso passed from the Ottoman Empire to Greece in 1913, during the Balkan Wars. In the 10th of July a massacre happened in the village. 22 men were put in two houses, with most of them being soldiers in World War Two. Only one of them survived and the rest were burnt alive. …

It is situated at the foot of mount Nemërçka, near the Albanian border. It is 3 km west of Vasiliko, 12 km northeast of Delvinaki, 16 km west of Konitsa, 36 km east of Gjirokastër (Albania) and 46 km northwest of Ioannina.

Kefalovryso has a mostly Aromanian population and is an Aromanian speaking village. Due to their origins from Albania, the Aromanian spoken in the village differs from the Aromanian spoken in the eastern Aromanian speaking area of Greek Epirus. Aromanian multipart singing (polyphony) is practised in the village.