George Herbert, 11th Earl of Pembroke
General George Augustus Herbert, 11th Earl of Pembroke and 8th Earl of Montgomery( 10 September 1759 – 26 October 1827) was an English peer, army officer, and politician.
David Lindsay, 11th Earl of Crawford
David Lindsay, 11th Earl of Crawford( 1547? – 1607) was a Scottish nobleman and privy councilor.
James Ogilvie-Grant, 11th Earl of Seafield
James Ogilvie-Grant, 11th Earl of Seafield, DL (18 April 1876 – 12 November 1915), briefly known as Viscount Reidhaven in 1888, was a Scottish nobleman.
Seafield was born in 1876 in Oamaru, New Zealand.
He was the eldest child of Francis William Ogilvy-Grant, 10th Earl of Seafield, and Ann Nina, daughter of Major George Thomas Evans, of County Limerick and of Clooneavin, New Zealand.
He had six siblings; four sisters and two brothers.
His youngest brother was Trevor Ogilvie-Grant (1879–1948).
His youngest sister, Nina Geraldine (1884–1951), married Sir Lees Knowles, 1st Baronet in 1915.
He started his education at Warwick House preparatory school in Christchurch (which his younger brother Trevor also attended).
He then attended Christ's College and Lincoln College.
He succeeded in the earldom and other titles and as 30th Chief of Clan Grant on his father's death in 1888.
Lord Seafield lived in Auckland before his marriage to Mary Elizabeth Nina Townend, the eldest daughter of Dr Joseph Henry Townend, of Christchurch, New Zealand, in 1898.
They had one daughter.
Lord Seafield served as a Justice of the Peace for Banffshire, Morayshire, and Inverness-shire.
He was commissioned a second lieutenant in the 3rd (Militia) Battalion, the Bedfordshire Regiment, on 21 June 1902.
He fought in World War I as a Captain in the 3rd Queen's Own Cameron Highlanders, and was attached to the 5th Battalion Cameron Highlanders.
He was a Deputy Lieutenant for the County of Elgin.
He was supposed to be on leave from action in World War I, but his leave got cancelled and he died on 12 November 1915, aged 39, from wounds received at Flanders in Belgium.
He is buried at Lijssenthoek Military Cemetery.
Lord Seafield was succeeded in the barony of Strathspey, the baronetcy of Colquhoun and as Chief of Clan Grant by his younger brother Hon.
Trevor Ogilvie-Grant.
The earldom and the other subsidiary Scottish peerages could be passed on to female heirs, and were inherited by his daughter Nina Caroline Studley-Herbert.
Nina Caroline Studley-Herbert, 12th Countess of Seafield
Nina Caroline Studley- Herbert, 12th Countess of Seafield( 17 April 1906 – 30 September 1969) was a Scottish peeress.
She was the only child of James Ogilvie- Grant, 11th Earl of Seafield and Ann Nina Ogilvie- Grant.
On 24 January 1930, she married Derek Herbert Studley- Herbert.
They divorced in 1957.
Her former husband died of cancer on 26 March 1960.
She was one of the seven godparents to Antony Armstrong- Jones, 1st Earl of Snowdon, who was christened on 5 April 1930 at the church of the Middle Temple.
The Countess of Seafield died on 30 September 1969 of cancer.
At her death, she was the second richest woman in Britain after the Queen.
Thomas Cochrane, 11th Earl of Dundonald
Thomas Barnes Cochrane, 11th Earl of Dundonald( 14 April 1814 – 15 January 1885) was a Scottish nobleman.
He was son of the radical politician and sailor Thomas Cochrane, 10th Earl of Dundonald.
As a child he accompanied his father to Chile.
Cochrane joined the British Army and eventually gained the rank of Captain.
On 31 October 1860, he succeeded his father as the 11th Earl of Dundonald.
Between 1879 and 1885, he was a Representative Peer of Scotland.
Francis William Ogilvy-Grant, 10th Earl of Seafield
Francis William Ogilvy-Grant, 10th Earl of Seafield and 2nd Baron Strathspey (9 March 1847 – 3 December 1888), was a Scottish peer who lived most of his adult life in New Zealand.
He was styled Viscount Reidhaven from 1884 to 1888.
William Robert Ogilvie-Grant
William Robert Ogilvie- Grant( 25 March 1863 – 26 July 1924) was a Scottish ornithologist.
James Ogilvy, 4th Earl of Findlater
James Ogilvy, 4th Earl of Findlater and 1st Earl of Seafield,( 11 July 166419 August 1730) was a Scottish politician.
Francis Talbot, 11th Earl of Shrewsbury
Francis Talbot, 11th Earl of Shrewsbury, 11th Earl of Waterford( 1623 – 16 March 1668), was an English peer who was a Royalist officer in the English Civil War.
He survived the war only to be mortally wounded in a duel with the Duke of Buckingham who was having an affair with his wife.
William Feilding, 11th Earl of Denbigh
William Rudolph Michael Feilding, 11th Earl of Denbigh( 1943 – 1995)( Peerage of England, cr 1622), and 10th Earl of Desmond( Peerage of Ireland, also cr 1622) died on 23 March 1995.
He married Caroline Judith Vivienne Cooke on 2 September 1965.
They had three children: Lady Samantha, Lady Louisa, and Alexander, the current 12th Earl of Denbigh and 11th Earl of Desmond.

Question: What is the date of death of James Ogilvie-Grant, 11Th Earl Of Seafield's father?
Answer: 3 December 1888