Lord Charles Spencer-Churchill
Lord Charles Spencer-Churchill (3 December 1794 – 28 April 1840) was a British army officer and politician.
He was the second son of George Spencer-Churchill, 5th Duke of Marlborough and Lady Susan Stewart, daughter of John Stewart, 7th Earl of Galloway.
Consuelo Vanderbilt
Consuelo Vanderbilt Balsan (formerly Consuelo Spencer-Churchill, Duchess of Marlborough; born Consuelo Vanderbilt; 2 March 1877 – 6 December 1964) was a member of the prominent American Vanderbilt family.
Her marriage to The 9th Duke of Marlborough has become an emblem of the socially advantageous, but loveless, marriages common during the Gilded Age.
Lord Ivor Spencer-Churchill
Lord Ivor Charles Spencer- Churchill( 14 October 1898 – 17 September 1956) was the younger son of the 9th Duke of Marlborough and his first wife, the former Consuelo Vanderbilt, an American railroad heiress.
His elder brother, John, was the 10th Duke of Marlborough.
Laura Spencer-Churchill, Duchess of Marlborough
Frances Laura Spencer- Churchill, Duchess of Marlborough(" née" Charteris; 10 August 1915 – 19 February 1990), was a British noblewoman and socialite.
She was variously Viscountess Long, Countess of Dudley and became Duchess of Marlborough upon her fourth marriage, to John Spencer- Churchill, 10th Duke of Marlborough.
She was the sister of novelist Hugo Charteris and Ann Charteris( who married Ian Fleming), as well as the granddaughter of Hugo Charteris, 11th Earl of Wemyss.
Her third husband, Michael Temple Canfield, was the former husband of Lee Radziwill, sister of Jacqueline Kennedy Onassis.
During World War II, she served as an auxiliary nurse.
John Spencer-Churchill, 10th Duke of Marlborough
John Albert William Spencer-Churchill, 10th Duke of Marlborough, DL (18 September 1897 – 11 March 1972), styled Marquess of Blandford until 1934, was a British military officer and peer.
He was born in London as the first of two sons born to Charles Spencer-Churchill, 9th Duke of Marlborough and his first wife, the former Consuelo Vanderbilt, an American railroad heiress.
Prior to inheriting the dukedom in 1934, he was a lieutenant-colonel in the Life Guards.
He was Mayor of Woodstock from 1937 to 1942.
Gladys Spencer-Churchill, Duchess of Marlborough
Gladys Marie Spencer-Churchill, Duchess of Marlborough ("née" Deacon; 7 February 1881 – 13 October 1977) was a French American aristocrat and socialite.
She was the mistress and later the second wife of Charles Spencer-Churchill, 9th Duke of Marlborough.
Susan Spencer-Churchill, Duchess of Marlborough
Susan Spencer-Churchill, Duchess of Marlborough (10 April 1767 – 2 April 1841), formerly Lady Susan Stewart, was the wife of George Spencer-Churchill, 5th Duke of Marlborough.
Lady Susan Stewart was the daughter of John Stewart, 7th Earl of Galloway, and his second wife, the former Anne Dashwood.
She married the future duke on 15 September 1791, when he was styled Marquess of Blandford.
They were married at her father's house in St James's Square, London, by the Archbishop of Canterbury, John Moore.
They had four children:
In 1817 the marquess inherited the dukedom from his father, George Spencer, 4th Duke of Marlborough, at which point his wife became Duchess of Marlborough.
The duchess died at her house in Park Lane, London, aged 73.
In the previous year two of her sons, Charles and Henry John, had died, along with Charles's wife and her husband the duke himself.
She was buried in the chapel of Blenheim Palace.
Rosita Spencer-Churchill, Duchess of Marlborough
Dagmar Rosita Astrid Libertas, Duchess of Marlborough( née Douglas, sometimes Spencer- Churchill; born 26 September 1943, Madrid) is a British artist of Swedish and German descent.
She was the third wife of John Spencer- Churchill, 11th Duke of Marlborough, from 1972 until their divorce in 2008.
Frances Anne Spencer-Churchill, Duchess of Marlborough
Frances Anne Spencer- Churchill, Duchess of Marlborough, VA( 15 April 1822 – 16 April 1899) was an English noblewoman, the wife of British peer and statesman John Spencer- Churchill, 7th Duke of Marlborough.
One of her sons, Lord Randolph Churchill was the father of Prime Minister Sir Winston Churchill.
She had a total of 11 children, and her principal home was the monumental Blenheim Palace, which she rejuvenated with her" lavish and exciting entertainments", and transformed into a" social and political focus for the life of the nation".
She was invested as a Lady of the Royal Order of Victoria and Albert for her efforts at famine relief in Ireland.
Charles Gordon-Lennox, 10th Duke of Richmond
Charles Henry Gordon- Lennox, 10th Duke of Richmond, 10th Duke of Lennox, 10th Duke of Aubigny, 5th Duke of Gordon( 19 September 1929 – 1 September 2017), styled Lord Settrington until 1935 and Earl of March and Kinrara between 1935 and 1989, was an English peer and landowner.
The son of Frederick Gordon- Lennox, 9th Duke of Richmond, he succeeded to the titles when his father died in 1989.
The seat of the Dukes of Richmond is Goodwood House in Sussex.
The 10th Duke moved to a smaller house nearby when his son Lord March took over control of the estate and moved into the main house with his family.

Question: When was John Spencer-Churchill, 10Th Duke Of Marlborough's mother born?
Answer: 2 March 1877