The House of Cantacuzino () is a Romanian aristocratic family of Byzantine origin. The family gave a number of princes to Wallachia and Moldavia, and it claimed descent from a branch of the Byzantine Kantakouzenos family, specifically from Byzantine Emperor John VI Kantakouzenos (reigned 1347–1354). After the Russo-Ottoman War of 1710–11, a lateral branch of the family settled in Russia, receiving the princely (Knyaz, as opposed to Velikij Knyaz) status. In 1944, Prince Ștefan Cantacuzino settled in Sweden, where his descendants form part of the unintroduced nobility of that country. Origin of the family Members of the family claim that the genealogical links between the Byzantine Greek and Romanian branches of the family have been extensively researched. The family first appears among the Phanariotes in the late 16th century, with Michael "Şeytanoğlu" Kantakouzenos, after a gap of over a century from the Fall of Constantinople. Whether the family is indeed linked to the Byzantine imperial house of Kantakouzenos is disputed, as it was usual among wealthy Greeks of the time to assume Byzantine surnames and claim descent from the famous noble houses of their Byzantine past. The first member of the family to publicly stress his imperial descent on an international level was the adventurer and pretender Radu Cantacuzino (1699–1761), who produced a genealogy linking himself to Emperor John VI Kantakouzenos, though it contained several invented figures. Radu also changed his coat of arms from the earlier arms depicting an eagle holding a cross, to a new rendition with more shields representing various families and regions, a version still in use by the family today. The eminent Byzantinist Steven Runciman considered the latter-day Kantakouzenoi "perhaps the only family whose claim to be in the direct line from Byzantine Emperors, as authentic", but according to the historian Donald Nicol, "Patriotic Rumanian historians have indeed labored to show that ... of all the Byzantine imperial families that of the Kantakouzenos is the only one which can truthfully be said to have survived to this day; but the line of succession after the middle of the fifteenth century is, to say the least, uncertain." The origin of the Byzantine family can be traced to Smyrna. The Greek scholar Konstantinos Amantos suggested that "Kantakouzenos" derives from , ultimately from the locality of Kouzenas, a name for the southern part of Mount Sipylon near Smyrna. Donald Nicol agrees with this theory, and lists some connections