Ælfthryth of Wessex was a noblewoman from the late 9th century, known for her marriage to Æthelstan, the King of England. She was the daughter of Ælfhelm, the ealdorman of Northumbria, and Wulfrun, which connected her to significant Anglo-Saxon lineage. Ælfthryth's family played a crucial role in the politics of the time, as her father was a prominent figure in the struggle against Viking invasions. Her marriage to Æthelstan helped solidify alliances between different regions of England. Ælfthryth is often remembered for her influence in the royal court and her contributions to the stability of the kingdom during a tumultuous period in English history.