Adelheid van Gelre (1145-1218) (1145–1218) Parents Henry I, Count of Guelders Agnes von Arnstein Children Imagina of Looz Gerard III, Count of Rieneck Thierry de Loos Louis II, Count of Loon Arnold III, Count of Loon Henry of Loon Siblings Otto I, Count of Guelders Margaret of Guelders Gerard of Guelders Agnes van Gelre Partners Gerard II, Count of Loon