Edmund Mortimer, 3rd Earl of March
Edmund de Mortimer, 3rd Earl of March and" jure uxoris" Earl of Ulster( 1 February 135227 December 1381) was son of Roger Mortimer, 2nd Earl of March, by his wife Philippa, daughter of William Montagu, 1st Earl of Salisbury and Catherine Grandison.
William Somerset, 3rd Earl of Worcester
William Somerset, 3rd Earl of Worcester, KG (c. 1526/7 – 21 February 1589) was an English courtier, nobleman, and politician.
He was the eldest son of Henry Somerset, 2nd Earl of Worcester and his second wife Elizabeth Browne.
On 26 November 1549, he succeeded his father and became the 3rd Earl of Worcester.
Before 19 May 1550, Worcester married Christiana North.
She was a daughter of Edward North, 1st Baron North and his wife Alice Squire.
They were parents to three children:
William Somerset married (2nd) before 1567 Theophila Newton, daughter of John Newton (otherwise Cradock), Knt., of East Harptree, Somerset, by Margaret, daughter of Anthony Poyntz, Knt.
A portrait of Countess Theophila by an unknown artist of that date is mentioned by Ashelford, Visual History of Costume (1983): 72.
Worcester supported Lady Jane Grey in 1553.
He was invested as Knight, Order of the Garter (K.G.) in 1570.
William Somerset died at his house Hackney on 21 February 1589 and was buried in the Church of St Cadoc, Raglan, Monmouthshire.
He was a patron of the arts, and sponsored - among others - the eminent Elizabethan actor Edward Alleyn.
Henry Somerset, 2nd Earl of Worcester
Henry Somerset, 2nd Earl of Worcester (26 November 1549) was an English nobleman.
He was the son of Charles Somerset, 1st Earl of Worcester and Elizabeth Herbert, 3rd Baroness Herbert.
On his father's death on 15 April 1526, he succeeded as the second Earl of Worcester.
From his mother, he inherited the title of Baron Herbert.
Somerset obtained Tintern Abbey after the Dissolution of the Monasteries.
He married twice:
Simon of Worcester
Simon was a medieval Bishop of Worcester.
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.
Elizabeth Somerset, Countess of Worcester (wife of the 4th Earl)
Elizabeth Hastings, later Countess of Worcester (born before 1556 – 24 August 1621) was a noblewoman born in Scotland to Francis Hastings, 2nd Earl of Huntingdon and Catherine Pole.
In December 1571, she married Sir Edward Somerset, 4th Earl of Worcester, son of Sir William Somerset, 3rd Earl of Worcester and Christian North.
In 1603 Elizabeth travelled to Berwick upon Tweed with other courtiers in an official party to welcome Anne of Denmark.
These were chosen by the Privy Council, following the order of King James of 15 April 1603.
The group consisted of two countesses, Frances Howard, Countess of Kildare, Elizabeth, Countess of Worcester; two baronesses Philadelphia, Lady Scrope and Penelope, Lady Rich; and two ladies Anne Herbert, a daughter of Henry Herbert, 2nd Earl of Pembroke, and Audrey Walsingham.
They welcomed the new queen into England on 3 June 1603.
John Talbot, 3rd Earl of Shrewsbury
Sir John Talbot, 3rd Earl of Shrewsbury, 3rd Earl of Waterford, 9th Baron Talbot, KG( 12 December 1448 – 28 June 1473) was an English nobleman.
He also held the subsidiary titles of 12th Baron Strange of Blackmere and 8th Baron Furnivall.
Although a soldier and an administrator, he was described by William of Worcester as' more devoted to literature and the muses, than to politics and arms'.
John Mackay (poet)
John Mackay( 1656–1754), known as( The Blind Piper), was a Scottish Gaelic poet and composer, and the grandfather of William Ross.
Gilbert Talbot, 3rd Baron Talbot
Gilbert Talbot, 3rd Baron Talbot( c. 1332–1387) was an English nobleman and soldier.
He was the grandfather of John Talbot, 1st Earl of Shrewsbury.
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.

Question: Who is the paternal grandfather of William Somerset, 3Rd Earl Of Worcester?
Answer: Charles Somerset, 1st Earl of Worcester