Helvig of Schleswig was a Danish princess born around 1300. She was the daughter of Valdemar IV of Denmark and Helvig of Norway. Helvig played a significant role in the political landscape of her time, particularly through her marriage to Count Gerhard VI of Holstein. Her marriage helped strengthen ties between Denmark and the Holstein region. Helvig's lineage contributed to the complex relationships among the ruling families in Northern Europe during the late medieval period, influencing alliances and territorial claims in the region.