Albertine, baroness Staël von Holstein
Hedvig Gustava Albertina, Baroness de Staël-Holstein or simply Albertine (1797–1838), was the daughter of Erik Magnus Staël von Holstein and Madame de Staël, the granddaughter of Jacques Necker and Suzanne Curchod, wife to Victor de Broglie (1785–1870), and mother to Albert, a French monarchist politician, and Louise, a novelist and biographer.
Her biological father may have been the author Benjamin Constant.
Victor-Maurice, comte de Broglie
Victor- Maurice, comte de Broglie( 12 March 16474 August 1727) was a French soldier and general.
Victor- Maurice de Broglie was born in the De Broglie house, a noble family originally from Piedmont.
He was the son of François- Marie, comte de Broglie and Angelique de Vassal, Countess of Favria.
After the death of his father he inherited the countships of Revel and de Broglie, the marquisate of Senonches and also received the Government of La Bassee, near Lille.
He served under Condé, Turenne, and other commanders of the age of Louis XIV in the Franco- Dutch War and other conflicts.
He was named" maréchal de camp" in 1676, lieutenant- general in 1688, and finally marshal of France in 1724, just three years before his death.
He had three sons, one of whom predeceased him.
The second son, Charles- Guillaume, marquis de Broglie, was his heir, while the third son, François- Marie, a general and a marshal of France like his father, became the first duc de Broglie.
Victor-François, 8th duc de Broglie
Victor-François Marie Léon, 8th duc de Broglie (25 March 1949, in Paris – 12 February 2012, in Broglie) was a French aristocrat and holder of the title of duc de Broglie.
The duke was born in Paris, the eldest son of Prince Jean de Broglie (1921–1976).
He acceded to the ducal title in 1987, after the death of his distant cousin, physicist and Nobel laureate Louis, 7th duc de Broglie, without heirs.
His father Jean's great-grandfather, Albert, 4th duc de Broglie, was Louis de Broglie's grandfather, and there was no other surviving senior male.
The duke was active in local politics in the Eure, and has served as mayor of the ducal seat of Broglie.
He died suddenly in castle of Broglie on 12 February 2012 ("Le Figaro", 14 February 2012, p. 15).
The duke was unmarried, and his titles were inherited by his younger brother, also unmarried.
However, there is another younger brother and several junior cousins, some with young sons.
Maurice de Broglie
Louis- César- Victor- Maurice, 6th duc de Broglie( 27 April 1875 – 14 July 1960) was a French physicist.
Brother of the theoretical physicist, Louis de Broglie.
Victor de Broglie (1846–1906)
Louis- Alphonse- Victor, 5th duc de Broglie, called Victor de Broglie( 30 October 1846 – 26 August 1906), was a French aristocrat.
Auguste-Théodore-Paul de Broglie
Abbé Auguste-Théodore-Paul de Broglie (June 18, 1834 in Auteuil, France – May 11, 1895) was professor of apologetics at the Institut Catholique in Paris, and writer on apologetic subjects.
He was the son of Achille-Victor, Duc de Broglie, and his wife, Albertine, baroness Staël von Holstein, a Protestant and the daughter of Madame de Staël.
After the death of his mother, who died young, he was brought up by the Baroness Auguste de Staël, née Vernet.
This aunt, although also a Protestant, exerted herself "to make a large-minded Christian of him in the Church to which she did not belong"
(Monseigneur d'Hulst in "Le Correspondant", 25 May 1895).
Broglie studied at the École Polytechnique, leaving in 1855.
Still young, he entered the navy; he was appointed ensign in 1857 and soon after lieutenant.
After a voyage to New Caledonia in which he came in contact with active missions, he felt himself called to the religious life.
He entered the Seminary of Saint Sulpice in Paris in 1867.
After completing his studies there he was ordained priest on 18 October 1870.
He was named professor of apologetics at the Institut Catholique in 1879.
His teaching, which included philosophical, theological, biblical and historical themes, were intended to defend the Catholic faith from perceived attacks from Positivism and Rationalism.
He maintained the harmony and autonomy of the two spheres of knowledge, religion and reason.
In his numerous publications the Abbé de Broglie was always a faithful defender of Catholic dogma.
At the time of his death, which resulted from the violence of an insane person he had taken under his protection, he was preparing a book on the agreement of reason and faith.
His most important work is "Problèmes et conclusions de l'histoire des religions" (Paris, 1886).
Of his other writings, some of which were pamphlets or articles in reviews, the following may be mentioned:
Two posthumous publications, "Religion et critique" (1896) and "Questions bibliques" (1897) were edited by the Abbé Piat.
Victor de Broglie (1756–1794)
Charles- Louis-Victor, prince de Broglie, called Victor de Broglie( 22 September 1756 – 27 June 1794) was a French soldier and politician.
Louis de Broglie
Louis Victor Pierre Raymond de Broglie, 7th duc de Broglie( 15 August 1892 – 19 March 1987) was a French physicist who made groundbreaking contributions to quantum theory.
In his 1924 PhD thesis, he postulated the wave nature of electrons and suggested that all matter has wave properties.
This concept is known as the de Broglie hypothesis, an example of wave – particle duality, and forms a central part of the theory of quantum mechanics.
De Broglie won the Nobel Prize for Physics in 1929, after the wave- like behaviour of matter was first experimentally demonstrated in 1927.
The 1925 pilot- wave model, and the wave- like behaviour of particles discovered by de Broglie was used by Erwin Schrödinger in his formulation of wave mechanics.
The pilot- wave model and interpretation was then abandoned, in favor of the quantum formalism, until 1952 when it was rediscovered and enhanced by David Bohm.
Louis de Broglie was the sixteenth member elected to occupy seat 1 of the Académie française in 1944, and served as Perpetual Secretary of the French Academy of Sciences.
De Broglie became the first high- level scientist to call for establishment of a multi-national laboratory, a proposal that led to the establishment of the European Organization for Nuclear Research( CERN).
Jean de Broglie
Prince Jean Marie François Ferdinand de Broglie (21 June 1921 – 24 December 1976) was a French politician.
Born in Paris, he was one of the negotiators of the Évian Accords.
Jean de Broglie was assassinated on 24 December 1976 while coming out of the house of Pierre de Varga.
His financial advisor, Varga was quickly arrested; in 1981, he was sentenced to ten years imprisonment for complicity in the assassination.
Jean de Broglie was the first son of Prince Eugene Marie Amédée de Broglie (1891–1957), himself the fourth son of Prince François Marie Albert de Broglie (1851–1939), himself the fourth son of Albert de Broglie, 4th duc de Broglie, whose mother, Albertine de Staël-Holstein (1797–1838), was the daughter of Germaine de Staël and, reputedly, Benjamin Constant.
By his wife Micheline Segard (1925–1997), he had three sons:
President de Assembly National 1959
Henri Amédée de Broglie
Henri Amédée de Broglie, Prince de Broglie( February 8, 1849- November 5, 1917).

Question: Who is the maternal grandfather of Auguste-Théodore-Paul De Broglie?
Answer: Erik Magnus Staël von Holstein