In the Early Middle Ages, four distinct linguistic and political groupings existed in what is now Scotland, each of which produced distinct material cultures. In the east were the Picts, whose kingdoms eventually stretched from the River Forth to Shetland. In the west were the Gaelic (Goidelic)-speaking people of Dál Riata, who had close links with Ireland, from where they brought with them the name Scots. In the south were the British (Brythonic-speaking) descendants of the peoples of the Roman-influenced kingdoms of "The Old North", the most powerful and longest surviving of which was the Kingdom of Strathclyde. Finally, there were the English or "Angles", Germanic invaders who had overrun much of southern Britain and held the Kingdom of Bernicia (later the northern part of Northumbria), which reached into what are now the Borders of Scotland in the south-east.