Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Margareta Fouché
Margareta Fouché d' Otrante, Princess of Sayn- Wittgenstein- Berleburg( 28 March 1909 – 25 August 2005) was the wife of Gustav Albrecht, 5th Prince of Sayn- Wittgenstein- Berleburg, and mother of Richard, 6th Prince of Sayn- Wittgenstein- Berleburg, who married Princess Benedikte of Denmark.
The daughter of Charles Louis Fouché, 6th Duke of Otranto( a descendant of Napoleonic statesman Joseph Fouché) and his first wife, Countess Hedvig Ingeborg Madeleine Douglas( a descendant of Louis I, Grand Duke of Baden), she was born Margareta Fouché d' Otrante in Elghammar, Sweden.
Her husband," Rittmeister" Gustav Albrecht, was the head of the mediatized princely house of Sayn- Wittgenstein- Berleburg.
He went missing in action in 1944, during World War II, and was declared legally dead in 1969.
From 1944 to 1955, after her husband was reported missing, Margareta, as Princess Dowager, became the guardian for her son, Prince Richard, and managed her late husband's properties.
The family went into exile in her native Sweden.
Prince Richard later married Princess Benedikte of Denmark.
Gustav, 7th Prince of Sayn-Wittgenstein-Berleburg
Gustav, 7th Prince of Sayn- Wittgenstein- Berleburg( Gustav Frederik Philip Richard; born 12 January 1969), is the eldest child and only son of Princess Benedikte of Denmark and Richard, 6th Prince of Sayn- Wittgenstein- Berleburg.
Princess Alexandra of Sayn-Wittgenstein-Berleburg
Princess Alexandra of Sayn- Wittgenstein- Berleburg, Countess Ahlefeldt- Laurvig- Bille( Alexandra Rosemarie Ingrid Benedikte; born 20 November 1970), is the first daughter and second of three children of Prince Richard of Sayn- Wittgenstein- Berleburg and Princess Benedikte of Denmark.
Under the succession rules set by King Frederik IX, since Princess Benedikte and her children, including Princess Alexandra, have not taken up permanent residence in Denmark, they have effectively waived their place in the line of succession to the Danish throne.
Since 19 May 1998, Alexandra has been a Danish citizen.
Princess Benedikte of Denmark
Princess Benedikte of Denmark, Princess of Sayn-Wittgenstein-Berleburg (Benedikte Astrid Ingeborg Ingrid, born 29 April 1944) is the second daughter and child of King Frederick IX and Queen Ingrid of Denmark.
She is the younger sister of the reigning Queen of Denmark, Margrethe II, and the older sister of Queen Anne-Marie of Greece.
Princess Benedikte often represents her elder sister at official or semi-official events.
She and her late husband, Richard, 6th Prince of Sayn-Wittgenstein-Berleburg, have three children.
Princess Benedikte is currently 11th in the line of succession to the Danish throne.
Princess Nathalie of Sayn-Wittgenstein-Berleburg
Princess Nathalie of Sayn- Wittgenstein- Berleburg( Nathalie Xenia Margrethe Benedikte; born 5 February 1975) is the youngest daughter and child of Prince Richard of Sayn- Wittgenstein- Berleburg and Princess Benedikte of Denmark and niece of Queen Margrethe II of Denmark and Queen Anne- Marie of Greece.
Ingrid of Sweden
Ingrid of Sweden
(Ingrid Victoria Sofia Louise Margareta; 28 March 1910 – 7 November 2000) was Queen of Denmark from 1947 until 1972 as the wife of King Frederick IX.
Born into the House of Bernadotte, she was the daughter of King Gustaf VI Adolf of Sweden and his first wife, Princess Margaret of Connaught.
In 1935 she married Crown Prince Frederick of Denmark and they had three daughters, Margrethe, the present Queen of Denmark, Benedikte, now a Princess of Sayn-Wittgenstein-Berleburg, and Anne-Marie, the former Greek queen.
In 1947, her husband became king on his father's death.
As queen, Ingrid reformed the traditions of Danish court life, abolished many old-fashioned customs at court and created a more relaxed atmosphere at official receptions.
King Frederick IX died in 1972, and Ingrid's daughter Margrethe became queen.
She was also a paternal aunt of the present Swedish monarch, King Carl XVI Gustaf.
Richard, 6th Prince of Sayn-Wittgenstein-Berleburg
Richard, 6th Prince of Sayn-Wittgenstein-Berleburg (Richard Casimir Karl August Robert Konstantin; 29 October 1934 – 13 March 2017) was the head of the House of Sayn-Wittgenstein-Berleburg and husband of Princess Benedikte of Denmark.
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.
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.

Question: Who is the maternal grandmother of Princess Benedikte Of Denmark?
Answer: Princess Margaret of Connaught