Madeleine de Bourbon-Busset
Madeleine de Bourbon- Busset( 23 March 1898 – 1 September 1984 in Paris) was the titular Duchess of Parma( from 1974) and was also Carlist queen of Spain( from 1952) as the consort of Prince Xavier of Bourbon- Parma, the Carlist pretender to the Spanish throne.
Princess Marie-Françoise of Bourbon-Parma
Princess Marie- Françoise Antoinette Jeanne Madeleine of Bourbon- Parma( born 19 August 1928) is a French- Italian humanitarian and the founder of the Malte Liban Association in Lebanon.
She is a princess of the House of Bourbon- Parma by birth and a princess of the House of Lobkowicz through marriage.
Prince Michel of Bourbon-Parma
Prince Michel of Bourbon- Parma
( Michel Marie Xavier Waldemar Georg Robert Karl Eymar; 4 March 1926 – 7 July 2018) was a French businessman, soldier and racing car driver, who was a member of deposed sovereign ducal House of Bourbon- Parma.
He was a son of Prince René of Bourbon- Parma and his wife Princess Margaret of Denmark.
Paternally, he was a grandson of Robert I, Duke of Parma( 1848 – 1907), while through his mother he was a great- grandson of Christian IX of Denmark.
Prince Michel was also the younger brother of Queen Anne of Romania.
Princess Margarita, Countess of Colorno
Princess Margarita Maria Beatriz of Bourbon-Parma, Countess of Colorno (born 13 October 1972), is the eldest daughter of Princess Irene of the Netherlands and Carlos Hugo, Duke of Parma, and is member of the Royal and Ducal House of Bourbon-Parma, as well of the Dutch Royal Family.
Prince Sixtus of Bourbon-Parma
Prince Sixtus of Bourbon-Parma (1 August 1886 – 14 March 1934) was a member of the House of Bourbon-Parma, a Belgian officer in World War I, and the central figure in the Sixtus Affair, an attempt to negotiate a treaty to end Austria-Hungary's participation in the Great War separate from its Central Powers allies.
He also wrote a number of books.
Prince Xavier of Bourbon-Parma
Xavier, Duke of Parma and Piacenza, known in France before 1974 as Prince Xavier de Bourbon-Parme, known in Spain as Francisco Javier de Borbón-Parma y de Braganza or simply as Don Javier (25 May 1889 – 7 May 1977), was the head of the ducal House of Bourbon-Parma and Carlist pretender to the throne of Spain.
He was the second son of the last reigning Duke of Parma
Robert I and his second wife Infanta Maria Antonia of Portugal, although born after his father lost the throne.
Educated with austerity at Stella Matutina, he grew up in France, Italy and Austria, where his father had properties.
During World War I, he joined the Belgian army, fighting with distinction.
With his brother Sixtus he was a go-between in the so-called Sixtus Affair, a failed attempt by his brother-in-law, Emperor Charles I of Austria to negotiate a separate peace with the Allies (1916–1917) through the Bourbon-Parma brothers.
In 1936 Don Alfonso Carlos de Borbón, Duke of Madrid died, ending the male line of pretenders to the Spanish throne descended from the rebel founder of Carlism, Infante Carlos, Count of Molina.
Having no children with his wife, Maria das Neves of Portugal, Don Alfonso Carlos designated her nephew Xavier to succeed him as regent in exile of the "Carlist Communion".
During the Spanish civil war (1936-1939), he entered Spain twice and the Carlist troops, known as Requetés, sided with the nationalists of General Franco.
He visited the North Front and Andalucia, but was expelled from Spain in 1938.
He settled in France at the castle of Bostz, a property of his wife.
During World War II, he reenlisted in the Belgian army.
After Belgium and France were invaded by the Nazis, he moved to Vichy and took part in the French Resistance.
Arrested by the "Gestapo" in 1941, he was condemned to death for espionage and terrorism.
Pardoned by Pétain, he was confined in Clermont-Ferrand, Schirmeck, Natzwiller and lastly, in September, he was imprisoned in Dachau from which he was freed by the Americans in April 1945.
During the 1950s and 1960s he was active in the Carlist movement.
In May 1952, persuaded of the need to be appointed king by the National Council of Traditionalist Communion, he agreed to conclude the sixteen years of his regency by being proclaimed King of Spain in Barcelona under the name Javier I.
Soon thereafter he was expelled from Spain by order of the Francoist government.
At the death of his unmarried nephew Robert of Parma in 1974, Prince Xavier became titular Duke of Parma.
By then he was in frail health, having suffered life-threatening injuries in a 1972 traffic accident.
He transferred all political authority to his eldest son, Prince Carlos Hugo of Bourbon-Parma, and formally abdicated as the Carlist king in his elder son's favor in 1975.
Prince Charles of Luxembourg
Prince Charles of Luxembourg, Prince of Bourbon- Parma and Nassau( Charles Frédéric Louis Guillaume Marie; 7 August 1927 – 26 July 1977), was a younger son of Grand Duchess Charlotte and Prince Felix of Bourbon- Parma.
Infanta Maria Antonia of Portugal
Infanta Maria Antónia of Portugal
(Portuguese: "Maria Antónia
Adelaide Camila Carolina Eulália
Leopoldina Sofia Inês Francisca de Assis e de Paula Micaela Rafaela Gabriela Gonzaga Gregória Bernardina Benedita Andrea"
; 28 November 1862 – 14 May 1959) was a Portuguese infanta, the seventh and last child of Miguel of Portugal and
Adelaide of Löwenstein-Wertheim-Rosenberg.
Princess Carolina, Marchioness of Sala
Princess Maria" Carolina" Christina of Bourbon- Parma, Marchioness of Sala( born 23 June 1974), is the fourth and youngest child of Princess Irene of the Netherlands and Carlos Hugo, Duke of Parma, and is a member of the Royal and Ducal House of Bourbon- Parma, as well as of the Dutch Royal Family.
Princess Margaret of Denmark
Princess Margaret of Denmark
( Margrethe Françoise Louise Marie Helene; 17 September 1895 – 18 September 1992) was a Danish princess by birth and a princess of Bourbon- Parma as the wife of Prince René of Bourbon- Parma.
She was the youngest grandchild of Christian IX of Denmark and Queen Louise.

Question: Who is Prince Xavier Of Bourbon-Parma's maternal grandmother?