Question: Who is the maternal grandmother of Anna Of Württemberg?

Knowledge 1: Anna of Württemberg
Anna of Württemberg (12 June 1561 in Stuttgart – 7 July 1616 in Chojnów), was a German princess, member of the House of Württemberg, and by her two marriages Duchess of Oława-Wołów and Legnica.She was the daughter of Christoph, Duke of Württemberg, by his wife Anna Maria of Brandenburg-Ansbach, daughter of George, Margrave of Brandenburg-Ansbach. [SEP] Knowledge 2: Anna Maria of Brandenburg-Ansbach
Anna Maria of Brandenburg-Ansbach (28 December 1526 – 20 May 1589) was a German princess of Brandenburg-Ansbach.Anna Maria was born at Jägerndorf, the eldest daughter of George, Margrave of Brandenburg-Ansbach and his second wife Hedwig of Münsterberg-Oels, daughter of Charles I of Münsterberg-Oels.Anna Maria was brought up as a Lutheran and on 24 February 1544 became the wife of Christoph, Duke of Württemberg.She later acted as guardian to her son Ludwig III, Duke of Württemberg early in his reign.After the death of her husband Christoph she lived more than 20 years in the Nürtingen castle, she died in Nürtingen.After losing both her husband and her eldest son in 1568, Anna Maria fell madly in love with the young Landgrave George I of Hesse-Darmstadt (1547–1596).Soon afterwards she became mentally confused and was locked up.George I later married her daughter Eleonore.She died in 1589 and was buried in the St. George's Collegiate Church in Tübingen.
Knowledge 1: Anna of Württemberg
Anna of Württemberg (12 June 1561 in Stuttgart – 7 July 1616 in Chojnów), was a German princess, member of the House of Württemberg, and by her two marriages Duchess of Oława-Wołów and Legnica.She was the daughter of Christoph, Duke of Württemberg, by his wife Anna Maria of Brandenburg-Ansbach, daughter of George, Margrave of Brandenburg-Ansbach. [SEP] Knowledge 2: Christoph, Duke of Württemberg
Christoph of Württemberg, Duke of Württemberg (12 May 1515 – 28 December 1568) ruled as Duke of Württemberg from 1550 until his death in 1568.
Knowledge 1: Anna Maria of Brandenburg-Ansbach
Anna Maria of Brandenburg-Ansbach (28 December 1526 – 20 May 1589) was a German princess of Brandenburg-Ansbach.Anna Maria was born at Jägerndorf, the eldest daughter of George, Margrave of Brandenburg-Ansbach and his second wife Hedwig of Münsterberg-Oels, daughter of Charles I of Münsterberg-Oels.Anna Maria was brought up as a Lutheran and on 24 February 1544 became the wife of Christoph, Duke of Württemberg.She later acted as guardian to her son Ludwig III, Duke of Württemberg early in his reign.After the death of her husband Christoph she lived more than 20 years in the Nürtingen castle, she died in Nürtingen.After losing both her husband and her eldest son in 1568, Anna Maria fell madly in love with the young Landgrave George I of Hesse-Darmstadt (1547–1596).Soon afterwards she became mentally confused and was locked up.George I later married her daughter Eleonore.She died in 1589 and was buried in the St. George's Collegiate Church in Tübingen. [SEP] Knowledge 2: Christoph, Duke of Württemberg
Christoph of Württemberg, Duke of Württemberg (12 May 1515 – 28 December 1568) ruled as Duke of Württemberg from 1550 until his death in 1568.

Answer: Hedwig of Münsterberg-Oels