Drust of Dalriada, also known as Drust mac Constantine, and Drust IX of the Picts, was like his father Constantine of Dalriada, both king of Dalriada and ruler of the Picts. He reigned from about 834-837, succeeding his uncle Oengus of Dalriada. Constantine of Dalriada, also known as Constantine mac Fergus. ... Dalriada or Dál Riata (as it was called in Ireland) was the kingdom of the Scotti (Sgaothaich in their own Gaelic language ) an ancient Irish tribe, who spread from eastern Ulster in Ireland to Argyll and eventually gave their name to Scotland. ... PICT is a graphics file format introduced on the original Apple Macintosh computer as its standard metafile format. ... Events First Viking raid of Dorestad. ... Events Pietro Tradonico elected Doge of Venice. ... Oengus of Dalriada, also known as Oengus mac Fergus Oengus was king of Dalriada. ...