David I of Gwynedd

David I of Gwynedd was a 12th-century Welsh noble who became the ruler of Gwynedd, a region in northwest Wales, after his brother Llywelyn ab Iorwerth. Known for strengthening his family's power, he played a key role in Welsh politics and warfare, often defending Welsh independence against encroaching English influence. His leadership helped maintain Welsh culture and resistance during a period of increasing external pressure, and his legacy laid the groundwork for future Welsh rulers.