Question: Who is the paternal grandmother of Eric I Of Denmark?

Knowledge 1: Eric I of Denmark
Eric I (– 10 July 1103), also known as Eric the Good , was King of Denmark following his brother Olaf I Hunger in 1095.He was a son of Sweyn II.His mother's identity is unknown.He married Boedil Thurgotsdatter. [SEP] Knowledge 2: Sweyn II of Denmark
Sweyn II Estridsson  (– 28 April 1076) was King of Denmark from 1047 until his death in 1076.He was the son of Ulf Thorgilsson and Estrid Svendsdatter, and the grandson of King Sweyn I Forkbeard through his mother's line.He was married three times, and fathered 20 children or more out of wedlock, including the five future kings Harald III Hen, Canute IVthe Saint, OlufI Hunger, EricI Evergood, and Niels.He was courageous in battle, but did not have much success as a military commander.His skeleton reveals that he was a tall, powerfully built man who walked with a limp.
Knowledge 1: Sweyn II of Denmark
Sweyn II Estridsson  (– 28 April 1076) was King of Denmark from 1047 until his death in 1076.He was the son of Ulf Thorgilsson and Estrid Svendsdatter, and the grandson of King Sweyn I Forkbeard through his mother's line.He was married three times, and fathered 20 children or more out of wedlock, including the five future kings Harald III Hen, Canute IVthe Saint, OlufI Hunger, EricI Evergood, and Niels.He was courageous in battle, but did not have much success as a military commander.His skeleton reveals that he was a tall, powerfully built man who walked with a limp. [SEP] Knowledge 2: Sophie of Pomerania, Duchess of Pomerania
Sophia of Pomerania- Stolp( 1435 – 24 August 1497), was a Duchess of Pomerania by birth, and married to Eric II, Duke of Pomerania.Sophia was the daughter of Bogislaw IX, Duke of Pomerania and Maria of Masovia.In 1446, her father died and was succeeded by his cousin, Eric of Pomerania, former King of Denmark, Norway and Sweden.Sophia became the heir of Eric of Pomerania's private fortune.In 1451, Sophia was married to Eric of Pomerania- Wolgast, making her spouse the heir of Eric of Pomerania's territories, while Sophia remained the heir of Eric of Pomerania's private fortune.At the death of Eric of Pomerania in 1459, Sophia's husband united Pomerania through the inheritance of Pomerania- Stolp and Pomerania- Rügenwalde by his marriage, while Sophia became the sole possessor of the vast fortune brought by Eric of Pomerania from his former kingdoms in Scandinavia, as well as the wealth he had acquired by his piracy activity on Gotland.As Eric refused to allow Sophia any of the political power over the territories he acquired through her, which she felt she was entitled to, the couple separated.Sophia moved to Rügenwalde Castle with her children and her lover, Hans of Maszerski.In 1470, she refused to finance her husband's war with Brandenburg.She was widowed in 1474.According to an old legend, she was to have poisoned her sons Wratislaw and Casimir, but when she tried to the same with her son Bogislaw with a poisoned sandwich, he was warned by his jester.The sandwich was given to a dog, who died, after which Sophia was to have fled to Danzig.
Knowledge 1: Eric I of Denmark
Eric I (– 10 July 1103), also known as Eric the Good , was King of Denmark following his brother Olaf I Hunger in 1095.He was a son of Sweyn II.His mother's identity is unknown.He married Boedil Thurgotsdatter. [SEP] Knowledge 2: Sophie of Pomerania, Duchess of Pomerania
Sophia of Pomerania- Stolp( 1435 – 24 August 1497), was a Duchess of Pomerania by birth, and married to Eric II, Duke of Pomerania.Sophia was the daughter of Bogislaw IX, Duke of Pomerania and Maria of Masovia.In 1446, her father died and was succeeded by his cousin, Eric of Pomerania, former King of Denmark, Norway and Sweden.Sophia became the heir of Eric of Pomerania's private fortune.In 1451, Sophia was married to Eric of Pomerania- Wolgast, making her spouse the heir of Eric of Pomerania's territories, while Sophia remained the heir of Eric of Pomerania's private fortune.At the death of Eric of Pomerania in 1459, Sophia's husband united Pomerania through the inheritance of Pomerania- Stolp and Pomerania- Rügenwalde by his marriage, while Sophia became the sole possessor of the vast fortune brought by Eric of Pomerania from his former kingdoms in Scandinavia, as well as the wealth he had acquired by his piracy activity on Gotland.As Eric refused to allow Sophia any of the political power over the territories he acquired through her, which she felt she was entitled to, the couple separated.Sophia moved to Rügenwalde Castle with her children and her lover, Hans of Maszerski.In 1470, she refused to finance her husband's war with Brandenburg.She was widowed in 1474.According to an old legend, she was to have poisoned her sons Wratislaw and Casimir, but when she tried to the same with her son Bogislaw with a poisoned sandwich, he was warned by his jester.The sandwich was given to a dog, who died, after which Sophia was to have fled to Danzig.

Answer: Estrid Svendsdatter