Tjuyu
Tjuyu( sometimes transliterated as Thuya or Thuyu) was an Egyptian noblewoman and the mother of queen Tiye, and the wife of Yuya.
She is the grandmother of Akhenaten, and great grandmother of Tutankhamun.
Princess Margaret of Connaught
Princess Margaret of Connaught
(Margaret Victoria Charlotte Augusta Norah; 15 January 1882 – 1 May 1920) was Crown Princess of Sweden and Duchess of Scania as the first wife of the future King Gustaf VI Adolf.
She was the elder daughter of Prince Arthur, Duke of Connaught, third son of Queen Victoria of the United Kingdom, and his wife Princess Louise Margaret of Prussia.
Known in Sweden as Margareta, she died 30 years before her husband's accession to the throne of Sweden.
Mona Hopton Bell
Mona Hopton Bell( 1867- 1940) was a British artist, best known for her portraits of civic figures.
She was the grandmother of the painter Jean H. Bell.
Carl Gustaf Mannerheim (naturalist)
Count Carl Gustaf Mannerheim( August 10, 1797 in Askainen, Finland to October 9, 1854 in Stockholm, Sweden) was a Finnish entomologist and governor of the Viipuri province in the Grand Duchy of Finland.
He was the son of Count Carl Erik Mannerheim( 1759 – 1837), the first Prime Minister of Finland.
Carl Snoilsky
Count Carl Johan Gustaf Snoilsky (8 September 1841 – 19 May 1903) was a Swedish lyric poet, known for his realist poetry.
Carl Johan Bernadotte
Carl Johan Arthur Bernadotte, Prince Bernadotte, Count of Wisborg, (31 October 1916 – 5 May 2012) was the fourth son and fifth and youngest child of King Gustaf VI Adolf of Sweden and his first wife Princess Margaret of Connaught.
He was born a Prince of Sweden and granted the title of Duke of Dalarna but renounced these titles to marry a commoner.
He was a paternal uncle of King Carl XVI Gustaf of Sweden and a maternal uncle of Queen Margrethe II of Denmark and Queen Anne-Marie of Greece.
Gunnila Bernadotte
Gunnila Märta Louise Bernadotte, Countess of Wisborg( 12 May 1923 – 12 September 2016) was a Swedish countess.
The daughter of, she was first married to in 1942; the couple had three children together.
Following his death, on 29 September 1988 in Copenhagen she became the second wife of Count Carl Johan Bernadotte, a widower and the youngest son of Gustaf VI Adolf.
Via her marriage to Bernadotte she became nobility in Luxemburg.
In 2010, Bernadotte gifted her with the house in Båstad, built many years earlier for himself and his first wife, Kerstin Wijkmark.
He died in 2012.
Carl Johan Wachtmeister
Count Carl Johan Wachtmeister (1 February 1903 – 22 May 1993) was a Swedish Army colonel and fencer.
He served as commanding officer of Norrland Dragoon Regiment (1952–1957) and the Stockholm Defence District (1957–1963).
Hubba bint Hulail
Hubba bint Hulail was the grandmother of Hashim ibn' Abd Manaf, thus the great- great- great- grandmother of the Islamic" Nabī"( Prophet) Muhammad ibn Abdullah.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.

Question: Who is the maternal grandmother of Carl Johan Bernadotte?
Answer: Princess Louise Margaret of Prussia