Bridei was a notable king of the Picts, a group of Celtic tribes in ancient Scotland, who reigned during the 6th century. He is often associated with the spread of Christianity in the region, particularly through his connections with missionaries like Columba, who played a significant role in converting the Picts to Christianity. Under Bridei's rule, the Pictish kingdom experienced a period of stability and growth. His reign is marked by the establishment of strong political alliances and the strengthening of the Pictish identity, which contributed to the cultural development of Scotland during this time.