King of One Hundred Battles: The Story of Drust I, Ruler of the Picts
The “Pictish Chronicle” is a very old, early medieval manuscript that is dated to the reign of Cináed mac Maíl Coluim, better known as Kenneth II , the king of Scotland from 971 to 995 AD. By this time in history, it can be safely assumed that the Pictish identity in the region of Scotland was hazy at best, and mostly phased out, assuming somewhat of a mythical role. The rapid progress of Gaelicization was underway, meaning that the Gaelic language quickly overshadowed and replaced the old Pictish language , which was much like the Brythonic language of old. Around t...
Source: ancient-origins.net