Ingardis was from Denmark. Traditionally, she has often been claimed to be a princess of Denmark.
She married Casimir II in 1210. Together, they had a son, Wartislaw III who would succeed as duke of Pomerania-Demmin, and a daughter, Elisabeth.
Ingardis ruled Pomerania-Demmin in place of young Wartislaw from Casimir's death 1219 until 1226. At that time, Pomerania-Demmin as well as the other part duchy Pomerania-Stettin were under Danish overlordship, which diminished after the 1227 Battle of Bornhöved and was finally dismissed when Wartislaw successfully countered a Danish expedition in 1234 with his Lübeck allies.
References
Dietmar Lucht: Herzog Wartislaw III. von Pommern. In: Baltische Studien, Neue Folge Bd. 53, 1967, S. 13–15.
Edward Rymar: Rodowód Książąt pomorskich, Szczecin 2005, S. 151–154.
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