What is "blakumen"

Blakumen or Blökumenn were a people mentioned in Scandinavian sources dating from the 11th through 13th centuries. The name of their land, Blokumannaland, has also been preserved. Victor Spinei, Florin Curta, Florin Pintescu and other historians identify them as Romanians (variation of the exonym Vlach), while Omeljan Pritsak argues that they were Cumans. Judith Jesch adds the possibility that the terms meant "black men", the meaning of which is unclear. Modern historians identify Blokumannaland as the lands south of the Lower Danube which were inhabited by Vlachs in the Middle Ages, adding that the term may refer to either Wallachia (to the north of the Danube) or Africa in the modern Icelandic language.