Сума је старо арбанашко име, не тако често око Скадра колико чини се у централним албанским подручјима јужније, с друге стране наставак +ор је више влашки, тако да је Сума + ор = Сумор.
Постоји албански фис са тим називом, Сума, североисточно од Скадра, чини ми се баш у области о којој је било речи (Кушево и катун Арбанаса); Елси о томе пише:
"The Suma (also Summa) tribal region is situated in the District of Shkodra in northern Albania, about 20 kilometres northeast of the city of Shkodra. It is to be found on the right (western) side of the upper Kir River in the mountainous and isolated Pulat region. Suma borders on the traditional tribal lands of Xhani to the north, Kiri to the east, Drishti to the south, and Rrjolli to the west. The main settlement of Suma is the little village of Bruçaj (formerly known as Suma).
Baron Nopcsa notes a personal name 'Demetrius Suma' recorded in 1332. Edith Durham informs us that: The name Suma occurs in a document of Tsar Dushan, who in 1335 gives to the monastery of Dechani, among other districts, 'the Albanian katun Tuzi' along with a number of luckless Albanians who are named: 'Petrus Suma, Mataguzh (the village of Mataguzhi was burnt by the Montenegrins in 1913) with his brothers Laz and Prijezda ... Progon, Mira, Marcus Suma, etc.'
The Suma believed that they came from Mirdita, more specifically from the tribe of Oroshi, and that they were thus related to the Shala and the Shoshi. They divided into several branches near Bojët e Sumës, a place situated close to the church of Xhani. Edith Durham confirms this belief: 'The present Suma tribe states that it comes from Mirdita. But as the Mirdites do not seem to have arrived till early in the fifteenth century, the "Suma" referred to in 1335 must be the eider population.'"
