Helvig of Schleswig

Helvig of Schleswig (c. 1320–1374), daughter of Eric II, Duke of Schleswig, was queen of Denmark as the wife of Valdemar IV Atterdag, and her marriage was a piece of politics. Her brother Valdemar V had once ruled Denmark as their uncle Gerhard III's ward.

In the late 1330s he allied with Christopher II's son Valdemar against Gerhard and sealed the pact by giving Helvig to him. They wed in 1340, and she brought the pawned province of Nørrejylland as her dowry. She bore Margaret, the future Margaret I, in 1353, after which she no longer lived with the king.

She spent her last years at Esrum Abbey, where she died in 1374 as a lay sister and was buried. A year later her daughter became regent of Denmark.