The Nuttall Encyclopedia
A Celtic race who came over from Ireland to Argyllshire, and established a kingdom in the SW. of Scotland, till King Kenneth Macalpin succeeded in 843, who obtained rule both over it and the northern kingdom of the Picts, and became the first king of Scotland.
Wood, James, ed. Entry for 'Dalri`ads'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/d/dalriads.html. Frederick Warne & Co Ltd. London. 1900.