Parents
Father: Duke Heinrich I of Braunschweig-Grubenhagen Born: 1267 Married: Unknown Died: September 7, 1322
Mother: Princess Agnes of Thuringen-Meissen Born: 1264 Died: September 1332
Children: 1. Princess Adelheid of Braunschweig-Grubenhagen (b.1288) 2. Duke Heinrich II of Braunschweig-Duderstadt (b.1289) 3. Princess Mechthild of Braunschweig-Grubenhagen (b.1291) 4. Duke Friedrich of Braunschweig-Grubenhagen (b.1292) 5. Princess Adelheid of Braunschweig-Grubenhagen (b.1294) 6. Duke Wilhelm of Braunschweig-Grubenhagen (b.1295) 7. Princess Agnes of Braunschweig-Grubenhagen (b.1296) 8. Duke Konrad of Bruanschweig-Grubenhagen (b.1298) 9. Princess Richardis of Braunschweig-Grubenhagen (b.1299) 10. Duke Albrecht of Braunschweig-Grubenhagen (b.1301) 11. Duke Johann of Braunschweig-Grubenhagen (b.1303) 12. Duke Ernst I of Braunschweig-Salz (b.1305)