Eric Alexander, 5th Earl of Caledon
Eric James Desmond Alexander, 5th Earl of Caledon( 9 August 1885 – 10 July 1968) was a soldier and the eldest son of James Alexander, 4th Earl of Caledon and his wife, Lady Elizabeth Graham- Toler.
He was born at his family's home in Carlton House Terrace, London, and succeeded to the title of Earl of Caledon upon the death of his father in 1898.
He went to Eton College from 1899 to 1903, and then to Trinity College, Cambridge.
He fought and was wounded in the First World War, served in the Baltic from 1919 to 1921, and gained the rank of Major in the service of the Life Guards.
Giving an interesting insight into the period, Mark Bence- Jones writes:" Her[ Lady Caledon, his mother] eldest son Eric, now the Earl of Caledon, was unmarried.
He had a lady- love, a marchioness with a husband and children; his mother would not have her at Caledon, so when she came to visit him she stayed at Glaslough, being given the best guest bedroom, the Mauve Room.
Unfortunately for the Leslies she injured her leg motoring while she was here and was laid up in the Mauve Room for weeks, with the lovesick Eric walking over for every meal."
Lord Caledon died unmarried on 10 July 1968, aged 82.
James Alexander, 3rd Earl of Caledon
James Du Pre Alexander, 3rd Earl of Caledon( 27 July 1812 – 30 June 1855), styled Viscount Alexander from birth until 1839, was a soldier and politician.
Born into an Ulster- Scots aristocratic family in London, he was the son of The 2nd Earl of Caledon and Lady Catherine Yorke.
He was educated from 1824 to 1828 at Eton College and then at Christ Church, Oxford.
He was appointed High Sheriff of Armagh in 1836 and was Member of Parliament for Tyrone between 1837 and 1839.
He succeeded to the title of Earl of Caledon on the death of his father on 8 April 1839.
He was then elected to the House of Lords as a Representative Peer for Ireland in 1841.
He gained the rank of captain in the service of the Coldstream Guards and was Colonel of the Tyrone Militia.
He married Lady Jane Frederica Harriot Mary Grimston, daughter of James Walter Grimston, 1st Earl of Verulam and Lady Charlotte Jenkinson, on 4 September 1845 at St. Michael's, St. Albans, Hertfordshire, and had issue: Lord Caledon died at the age of 42 at his house in Carlton House Terrace, London, on 30 June 1855 and was buried at Caledon in County Tyrone, Ireland.
Lady Caledon died on 30 March 1888.
Du Pre Alexander, 2nd Earl of Caledon
Du Pré Alexander, 2nd Earl of Caledon KP (14 December 1777 – 8 April 1839), styled The Honourable Du Pré Alexander from 1790 to 1800 and Viscount Alexander from 1800 to 1802, was an Irish peer, landlord and colonial administrator, and was the second child and only son of James Alexander, 1st Earl of Caledon.
James Alexander, 4th Earl of Caledon
James Alexander, 4th Earl of Caledon KP, DL( 11 July 1846 – 27 April 1898), styled Viscount Alexander from birth until 1855, was a soldier and politician.
He was the eldest son of James Du Pre Alexander, 3rd Earl of Caledon and his wife, Lady Jane Grimston.
He was born at his family's home in Carlton House Terrace, London, and educated at Harrow and Christ Church, Oxford.
He succeeded to the title Earl of Caledon at the age of nine upon the death of his father in 1855.
In 1861, during his minority, an extensive but remote property at Castlederg, County Tyrone, known as the Derg Estate, was purchased through the Landed Estates Court by his guardians from a kinsman of the Alexanders, Sir Robert Ferguson.
The Caledon family took an active interest in the management of their estates.
The 2nd and 3rd Earls made extensive improvements to the village of Caledon, erected the flour mill in the village, gave financial support to the poor of Caledon and to schools on the estate, and improved their property by draining, liming, etc.
In addition, large sums of money were spent improving and extending the' big house' at Caledon( variously known as Caledon House, Caledon Hill and Caledon Castle), and on laying out the richly ornamental demesne and gardens of over.
As an adult, Lord Caledon was elected to sit in the House of Lords as a Representative Peer for Ireland in 1877 and was Deputy Lieutenant of County Tyrone.
He gained the rank of Captain in the service of the 1st Life Guards, became a Major serving with the 4th Battalion, Royal Inniskilling Fusiliers and fought in the Egyptian Campaign in 1882.
He was also invested as a Knight of the Order of St Patrick on 14 November 1896.
He married Lady Elizabeth Graham- Toler, daughter of Hector Graham- Toler, 3rd Earl of Norbury, on 9 October 1884 and had issue:
Writing about the Caledons' neighbours Sir John Leslie and his wife Constance, Mark Bence- Jones says:" As a grande dame, Lady Constance[ Leslie] was surpassed by her much younger neighbour, the Countess of Caledon, who lived with her husband and four sons at Caledon, a magnificent Georgian house of which the demesne marched with that of Glaslough, though it was across the county boundary in Tyrone.
Lady Constance, when she drove out in her carriage, has a liveried footman on the box; Lady Caledon had postillions in white buckskin breeches.
Only once did Lady Caledon appear at a disadvantage; she turned up unexpectedly at Glaslough just before dinner in an evening dress and satin slippers, having walked all the way from Caledon after her husband had done something to offend her.
She was welcomed by Lady Constance, given dinner and put into the best guest bedroom for the night.
Next morning a contrite Lord Caledon came for her in a pony trap, waiting at the inner gate until she chose to join him."
Lord Caledon died on 27 April 1898 at the age of 51 in Curzon Street, Mayfair, London, from blood poisoning and pneumonia.
He was buried at Caledon, County Tyrone.
Lady Caledon died on 6 October 1939.
Josias du Pré Alexander
Josias Du Pré Alexander( 1771 – 20 Aug 1839) was an Irish- born officer of the British East India Company who sat in the House of Commons of the United Kingdom in two periods between 1820 and 1832.
Born in County Londonderry, Alexander joined the East India Company in 1796, and later became a private merchant in Calcutta.
His time in India gained him huge wealth.
He returned to the United Kingdom in 1818, and bought an estate in Hampshire.
In 1820 he and his brother James jointly purchased the rotten borough of Old Sarum from their cousin Du Pre Alexander, 2nd Earl of Caledon, and returned himself to Parliament that year.
With support of the Chancellor Nicholas Vansittart, 1st Baron Bexley, he was elected as a director of East India Company, a post he held until 1838.
Ralph Neville, 3rd Earl of Westmorland
Ralph Neville, 3rd Earl of Westmorland( c. 1456 – 6 February 1499) was an English peer.
He was the grandfather of Ralph Neville, 4th Earl of Westmorland.
Thomas Bruce, 2nd Earl of Ailesbury
Thomas Bruce, 2nd Earl of Ailesbury( later styled Aylesbury) and 3rd Earl of Elgin( 1656 – 16 December 1741) was an English politician and memoirist.
He was the son of Robert Bruce, 2nd Earl of Elgin, and Lady Diana Grey.
His maternal grandparents were Henry Grey, 1st Earl of Stamford, and Lady Anne Cecil, daughter of William Cecil, 2nd Earl of Exeter.
His" Memoirs", which were not published until long after his death, are a valuable source for English history in the last quarter of the seventeenth century.
Shane Alexander, 2nd Earl Alexander of Tunis
Shane William Desmond Alexander, 2nd Earl Alexander of Tunis( born 30 June 1935), known as Lord Rideau from 1952 to 1969, is a British peer.
James Alexander, 1st Earl of Caledon
James Alexander, 1st Earl of Caledon (1730 – 22 March 1802) was an Irish landlord, merchant, politician and peer of the realm.
The second son of Alderman Nathaniel Alexander of Derry, he was the effective founder of the Caledon family, and certainly the founder of its fortune.
Denis Alexander, 6th Earl of Caledon
Denis James Alexander, 6th Earl of Caledon( 10 November 1920 – 20 May 1980) was a soldier and landowner
He was the son of Lt.- Col. Hon. Herbrand Charles Alexander and Millicent Valla Meredyth and grandson of James Alexander, 4th Earl of Caledon.
He was educated at Eton College and at the Royal Military College, Sandhurst.
He gained the rank of Major in the service of the Irish Guards.

Question: Who is the paternal grandfather of Du Pre Alexander, 2Nd Earl Of Caledon?
Answer: Nathaniel Alexander