Question: Who is the paternal grandmother of Sigrid Of Sweden (1566–1633)?

Knowledge 1: Sigrid of Sweden (1566–1633)
Sigrid Eriksdotter of Sweden (15 October 1566 – 1633) was a Swedish princess, the legitimized daughter of King Eric XIV of Sweden and of his lover, later spouse and queen, Karin Månsdotter. [SEP] Knowledge 2: Eric XIV of Sweden
Eric XIV (13 December 153326 February 1577) was King of Sweden from 1560 until he was deposed in 1568.Eric XIV was the eldest son of Gustav I (1496–1560) and Catherine of Saxe-Lauenburg (1513–35).He was also ruler of Estonia, after its conquest by Sweden in 1561.While he has been regarded as intelligent and artistically skilled, as well as politically ambitious, early in his reign he showed signs of mental instability, a condition that eventually led to insanity.Some scholars claim that his illness began early during his reign, while others believe that it first manifested with the Sture murders.Eric, having been deposed and imprisoned, was most likely murdered.An examination of his remains in 1958 confirmed that he probably died of arsenic poisoning.
Knowledge 1: Sigrid of Sweden (1566–1633)
Sigrid Eriksdotter of Sweden (15 October 1566 – 1633) was a Swedish princess, the legitimized daughter of King Eric XIV of Sweden and of his lover, later spouse and queen, Karin Månsdotter. [SEP] Knowledge 2: Åke Henriksson Tott
Åke Henriksson Tott (or Achatius Tott) (1598–1640) was a Swedish soldier and politician.His estates included Ekolsund in Sweden, Sjundeby in Finland, Polchow in Swedish Pomerania and Lihula in Swedish Livonia.He was born in Lohja to Princess Sigrid of Sweden and nobleman Henrik Klasson Tott.He was appointed Privy Councilor in 1630, and Field Marshal in 1631.In the Thirty Years' War (1618–1648), he commanded troops at the Battle of Grubin, in 1627 and the Battle of Breitenfeld, in 1631.King Gustavus Adolphus of Sweden is said to have called him "the snow plow, who is going to clear the path for the rest".He married Sigrid Bielke (1607–1634), and fathered Clas Åkesson Tott the younger, and Åke Henrik Åkesson Tott.
Knowledge 1: Eric XIV of Sweden
Eric XIV (13 December 153326 February 1577) was King of Sweden from 1560 until he was deposed in 1568.Eric XIV was the eldest son of Gustav I (1496–1560) and Catherine of Saxe-Lauenburg (1513–35).He was also ruler of Estonia, after its conquest by Sweden in 1561.While he has been regarded as intelligent and artistically skilled, as well as politically ambitious, early in his reign he showed signs of mental instability, a condition that eventually led to insanity.Some scholars claim that his illness began early during his reign, while others believe that it first manifested with the Sture murders.Eric, having been deposed and imprisoned, was most likely murdered.An examination of his remains in 1958 confirmed that he probably died of arsenic poisoning. [SEP] Knowledge 2: Åke Henriksson Tott
Åke Henriksson Tott (or Achatius Tott) (1598–1640) was a Swedish soldier and politician.His estates included Ekolsund in Sweden, Sjundeby in Finland, Polchow in Swedish Pomerania and Lihula in Swedish Livonia.He was born in Lohja to Princess Sigrid of Sweden and nobleman Henrik Klasson Tott.He was appointed Privy Councilor in 1630, and Field Marshal in 1631.In the Thirty Years' War (1618–1648), he commanded troops at the Battle of Grubin, in 1627 and the Battle of Breitenfeld, in 1631.King Gustavus Adolphus of Sweden is said to have called him "the snow plow, who is going to clear the path for the rest".He married Sigrid Bielke (1607–1634), and fathered Clas Åkesson Tott the younger, and Åke Henrik Åkesson Tott.

Answer: Catherine of Saxe-Lauenburg