ascendencia de Elizabeth of Brunswick-Grubenhagen

Elizabeth of Brunswick-Grubenhagen (20 March 1550 – 11 February 1586) was the first wife of Duke John of Schleswig-Holstein-Sonderburg, the son of King Christian III of Denmark. Elizabeth was the only daughter of Duke Ernest III of Brunswick-Grubenhagen and his wife, Duchess Margaret of Pomerania.

Ernest III of Brunswick-Grubenhagen-Herzberg (by a different counting: Ernest IV; 17 December 1518 in Osterode am Harz – 2 April 1567 in Herzberg Castle, Herzberg am Harz), was a member of the noble family of Guelph and a duke of Brunswick-Grubenhagen.

Ernest was the eldest son of Duke Philip I of Brunswick-Grubenhagen (1476–1551) and his second wife, Countess Catherine of Mansfeld-Vorderort (1501–1535), eldest daughter of Count Ernest II and his first wife Barbara of Querfurt. His paternal grandparents were Duke Albert II of Brunswick-Grubenhagen and his wife Countess Elisabeth of Waldeck.

 Princess Margaret of Pomerania-Wolgast (1518–1569), eldest daughter of Duke George I of Pomerania and his first wife, Princess Amalia of the Palatinate. 

Philip I, Duke of Brunswick-Grubenhagen (German: Philipp I., Herzog von Braunschweig-Grubenhagen; 1476 – 4 September 1551, Herzberg) was a member of the House of Guelph. He was ruler of the Principality of Grubenhagen. He was the second son of Duke Albert II of Grubenhagen and his wife Elizabeth, née Countess of Waldeck.

Catherine of Mansfeld-Vorderort (born October 1, 1501; died 1535).

Albert II, Duke of Brunswick-Lüneburg (German: Albrecht II., Herzog zu Braunschweig-Lüneburg; 1 November 1419 – 15 August 1485), was a Prince of Grubenhagen; he reigned from 1440 until his death in 1485.

Albert II was the third son of Duke Eric I and Elizabeth of Brunswick-Göttingen, a daughter of Otto the Bad, Duke of Brunswick-Göttingen. 

Elizabeth, daughter of Count Wolrad I of Waldeck

Eric I, Duke of Brunswick-Grubenhagen nicknamed the winner (German: Erich I., Herzog von Braunschweig-Grubenhagen; c. 1383 – 28 May 1427), ruled the Principality of Grubenhagen, a part of the Duchy of Brunswick-Lüneburg.

Eric was the only son of the Duke Albert I of Brunswick-Grubenhagen, who died in 1383, and his wife Agnes I, a daughter of Duke Magnus II of Brunswick-Lüneburg.

Elisabeth, a daughter of Duke Otto I "the Angry" of Brunswick-Göttingen

Albert I of Brunswick-Grubenhagen (c. 1339 – probably 1383) was a Duke of Brunswick-Lüneburg, and Prince of Brunswick-Grubenhagen-Salzderhelden. He reigned from 1361 until his death.

Albert I was the eldest son of the Duke Ernest the elder of Grubenhagen and his wife, Adelheid of Eberstein.

Agnes, daughter of Duke Magnus with the chain of Brunswick

Ernest I of Brunswick-Grubenhagen (German: Ernst I., Fürst von Braunschweig-Grubenhagen; c.  1297 – 9 March 1361) was Prince of Brunswick-Grubenhagen.

He was the son of Henry I, the Admirable and his wife Agnes, née Countess of Meissen.

Adelheid of Everstein-Polle (died after 29 September 1373), daughter of Count Henry II of Eberstein

Henry I (August 1267 – 7 September 1322), Duke of Brunswick-Lüneburg, called the Admirable (German: Heinrich der Wunderliche, Latin: Henricus Mirabilis), a member of the House of Welf, was the first ruler of the Principality of Grubenhagen from 1291 until his death.

He was the eldest son of the Brunswick duke Albert the Tall and his second wife Adelaide, daughter of Margrave Boniface II of Montferrat

Agnes of Meissen (born before 1264 – died after September 1332) was a noblewoman, the daughter of Albert II, Margrave of Meissen and his wife Margaret of Sicily

Albert the Tall (Latin: Albertus Longus, German: Albrecht der Große; 1236 – 15 August 1279), a member of the House of Welf, was Duke of Brunswick-Lüneburg from 1252 and the first ruler of the newly created Principality of Brunswick-Wolfenbüttel from 1269 until his death.

Albert was the oldest surviving son of the first Brunswick duke Otto the Child and his wife, Matilda of Brandenburg

Adelheid (Alessia) (1242 – February 6, 1284/85), daughter of Margrave Boniface II of Montferrat around 1263

Otto I of Brunswick-Lüneburg (about 1204 – 9 June 1252), a member of the House of Welf, was the first duke of Brunswick-Lüneburg from 1235 until his death. He is called Otto the Child to distinguish him from his uncle, Emperor Otto IV.

Otto was born around 1204 as the only son of William of Winchester and his wife Helena, a daughter of King Valdemar I of Denmark. His father was the youngest son of Henry the Lion, the former Duke of Saxony who had been deposed by the Hohenstaufen emperor Frederick Barbarossa in 1180. By an 1202 agreement with his brothers Count Palatine Henry V and King Otto IV, William had received the Welfs' allodial properties in Saxony around Lüneburg.

Matilda of Brandenburg (also called Mechthild; c. 1210 – 10 June 1261), a member of the House of Ascania, was first Duchess consort of Brunswick-Lüneburg from 1235 to 1252 by her marriage with the Welf duke Otto the Child.

Matilda was the elder daughter of Margrave Albert II of Brandenburg and his wife Matilda (Mechthild), a daughter of the Wettin margrave Conrad II of Lusatia

William of Winchester (11 April 1184 – 13 December 1213), also called William of Lüneburg (German: Wilhelm von Lüneburg) or William Longsword,^[1] a member of the House of Welf, was heir to his family's allodial lands in the Duchy of Saxony after the deposition of his father, Duke Henry the Lion in 1180.

William was the fifth and youngest son of Henry the Lion and Matilda, the eldest daughter of King Henry II of England.^[2]He was born in Winchester, England during his father's exile; he probably remained there when Henry returned to Saxony and was raised at King Richard's court.

Princess Helena of Denmark^[1] (c.  1180 – 22 November 1233 in Lüneburg) was heiress of Garding and by marriage Duchess of Lüneburg. She is the ancestress of all later Guelphs.

Helen was the youngest daughter of Valdemar I of Denmark and Sophia of Minsk. She was the sister of the Kings Canute VI and Valdemar II and Queen Ingeborg.

Henry the Lion (German: Heinrich der Löwe; 1129/1131^[1] – 6 August 1195^[1]) was a member of the Welf dynasty and Duke of Saxony, as Henry III, from 1142, and Duke of Bavaria, as Henry XII, from 1156, the duchies of which he held until 1180. 

Born in Ravensburg, in 1129 or 1131,^[1] he was the son of Henry the Proud,^[1] Duke of Bavaria and Saxony, who was the son of Duke Henry the Black and an heir of the Billungs, former dukes of Saxony. Henry's mother was Gertrude,^[1] only daughter of Emperor Lothair III and his wife Richenza of Northeim, heiress of the Saxon territories of Northeim and the properties of the Brunones, counts of Brunswick.^[1]
Matilda of England (German: Mathilde von England, also called Maud; 6 January 1156 – 28 June 1189) was the eldest daughter of King Henry II of England and Eleanor of Aquitaine. Through her marriage with the Welf duke Henry the Lion, she was Duchess consort of Saxony and Bavaria from 1168 until her husband's deposition in 1180.