Albert III, Duke of Saxe-Lauenburg German duke (1281–1308) Parents Ingeborg Birgersdotter of Bjelbo John I, Duke of Saxony Children Albrecht von Sachsen-Ratzeburg Erich von Sachsen-Ratzeburg Siblings Helena of Saxe-Lauenburg John II, Duke of Saxe-Lauenburg Eric I, Duke of Saxe-Lauenburg Elisabeth von Sachsen-Lauenburg Partners Margaret of Brandenburg