During the reign of Cínaed's grandson, Caustantín mac Áeda (900–943), outsiders began to refer to the region as the Kingdom of Alba rather than the Kingdom of the Picts, but it is not known whether this was because a new kingdom was established or Alba was simply a closer approximation of the Pictish name for the Picts. However, though the Pictish language did not disappear suddenly, a process of Gaelicisation (which may have begun generations earlier) was clearly underway during the reigns of Caustantín and his successors. By a certain point, probably during the 11th century, all the inhabitants of northern Alba had become fully Gaelicised Scots, and Pictish identity was forgotten. Later, the idea of Picts as a tribe was revived in myth and legend.