William Fitzalan, 9th Earl of Arundel
William Fitzalan, 9th Earl of Arundel, 6th Baron Maltravers( 23 November 1417 – 1487) was an English nobleman.
Born on 23 November 1417, William was the second son of John Fitzalan, 6th Earl of Arundel( 1385 – 1421), and Eleanor Berkeley( d. 1455), daughter of John Berkeley of Beverston.
His elder brother John Fitzalan, 7th Earl of Arundel, died on 12 June 1435.
The title passed to William's nephew Humphrey Fitzalan, 8th Earl of Arundel, who was only a six- year- old with no descendants.
William thus became the heir presumptive and, when Humphrey died three years later on 24 April 1438, he succeeded to the title.
William d'Aubigny, 2nd Earl of Arundel
William d'Aubigny, 2nd Earl of Arundel (b. [1138-1150], d. 24 December 1193), also called William de Albini III, was the son of William d'Aubigny, 1st Earl of Arundel and Adeliza of Louvain, widow of Henry I of England.
He married Maud de St. Hilary and among their children was William d'Aubigny, 3rd Earl of Arundel.
The Duke of Norfolk's Archives Assistant Librarian Sara Rodger wrote that William "did have three sons, William who succeeded him as Earl in 1196, and Alan and Geoffrey, of whom we know nothing."
His daughter, Matilda d'Aubigny, married William de Warenne, 5th Earl of Surrey.
In 1176/7 he was created Earl of Sussex and in 1190 he inherited the earldom of Arundel.
He is buried at Wymondham Abbey, Norfolk, England.
Thomas Fitzalan, 10th Earl of Arundel
Thomas Fitzalan otherwise Arundel, 10th Earl of Arundel, 7th Baron Maltravers( 145025 October 1524) was the son of William Fitzalan, 9th Earl of Arundel, and Joan Neville, eldest daughter of Richard Neville, 5th Earl of Salisbury, and Alice Montagu," suo jure" Countess of Salisbury.
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.
Humphrey Fitzalan, 8th Earl of Arundel
Humphrey Fitzalan, 8th Earl of Arundel, 5th Baron Maltravers( 30 January 142924 April 1438).
This Earl of Arundel was short lived.
He was a son of John Fitzalan, 7th Earl of Arundel, and Maud Lovell.
His father died on 12 June 1435, leaving 6- year- old Humphrey as the 15th Earl of Arundel.
Humphrey died three years later, at age 9.
The title then passed to his uncle William Fitzalan, 9th Earl of Arundel.
His older half- sister Avice Stafford( 4 December 14233 June 1457) married James Butler, 1st Earl of Wiltshire.
William d'Aubigny, 1st Earl of Arundel
William d' Aubigny, 1st Earl of Lincoln and 1st Earl of Arundel( c. 110912 October 1176), also known as William d' Albini, William de Albini and William de Albini II, was an English nobleman.
He was the son of William d'Aubigny" Pincerna" of Old Buckenham Castle in Norfolk, and Maud Bigod, daughter of Roger Bigod of Norfolk.
William d'Aubigny, 4th Earl of Arundel
William d' Aubigny, 4th Earl of Arundel, also known as William de Albini V( b. 1203 – before 7 August 1224) was the eldest son of William d'Aubigny, 3rd Earl of Arundel and Mabel of Chester( born c. 1173), daughter of Hugh de Kevelioc, 3rd Earl of Chester and Bertrade de Montfort of Évreux.
He became Earl of Arundel and Earl of Sussex on 30 March 1221.
He was buried at Wymondham Abbey, Norfolk.
There is no evidence that he married or had children.
He was the Chief Butler of England and was succeeded by his brother, Hugh.
William d'Aubigny, 3rd Earl of Arundel
William d' Aubigny, 3rd Earl of Arundel, also called William de Albini IV,( before 1180 – 1 February 1221) was an English nobleman, a favourite of King John, and a participant in the Fifth Crusade.
Adeliza of Louvain
Adeliza of Louvain, sometimes known in England as Adelicia of Louvain, also called Adela and Aleidis; (c. 1103 – March/April 1151) was Queen of England from 1121 to 1135, as the second wife of King Henry I. She was the daughter of Godfrey I, Count of Louvain.
Henry was some 35 years older than his bride, who was about 18 when they married.
He already had children, though no surviving son, from his first marriage to Matilda of Scotland, as well as several illegitimate ones.
As his second marriage produced no children, the decision was made to leave the throne to his daughter, the Empress Matilda; an oath was sworn by the clergy, members of the royal family, including Adeliza, as well as English nobles to recognise Matilda as Henry's heir upon his death.
After his death Adeliza spent three years based in a convent, then married again and had seven children by William d'Aubigny, 1st Earl of Arundel.
But a year before her death at the age of forty eight she left her husband to move to a monastery in Flanders, where at least one of her brothers also lived.
Adeliza's royal marriage seems to have been successful, apart from the failure to produce a new heir.
The flow of Henry's illegitimate children seems already to have ceased by the time of the marriage, and they spent most of their marriage together, which was by no means inevitable in royal marriages of the period.
She seems to have been influential in the promotion of French poetry and other arts at court, but played little part in politics.
Hugh d'Aubigny, 5th Earl of Arundel
Hugh d' Aubigny, 5th Earl of Arundel( died 7 May 1243) was the last in the Aubigny male line to hold the Arundel Castle.
He was the son of William d'Aubigny, 3rd Earl of Arundel and younger brother of William d'Aubigny, 4th Earl of Arundel.
He inherited his title on the death of his elder brother in 1224.
He also inherited the position of hereditary Chief Butler of England for life.
In 1242 he was one of the seven Earls who accompanied the King Henry in his expedition to Aquitaine.
On his death he was buried at Wymondham Abbey and his large estates divided amongst his four sisters and their issue.
His title of Earl of Arundel was inherited by his nephew John FitzAlan, 6th Earl of Arundel, son of his sister Isabel d'Aubigny.
He had married Isabel de Warenne( c. 1228– 1282), daughter of William de Warenne, 5th Earl of Surrey and Maud Marshal( 1192 – 1248).
They had no children.
His widow never remarried but became an important countess who founded the Cistercian Abbey at Marham and may have been buried at Convent Church Marham.

Question: Who is the maternal grandfather of William D'Aubigny, 2Nd Earl Of Arundel?
Answer: Godfrey I, Count of Louvain