John Crichton-Stuart, 4th Marquess of Bute
John Crichton- Stuart, 4th Marquess of Bute, KT( 20 June 1881 – 25 April 1947), was a Scottish peer.
John Paulet, 5th Marquess of Winchester
John Paulet, 5th Marquess of Winchester( c. 1598 – 5 March 1675), styled Lord John Paulet until 1621 and Lord St John from 1621 to 1628, was the third but eldest surviving son of William Paulet and his successor as 5th Marquess of Winchester.
William Paulet, 3rd Marquess of Winchester
William Paulet, 3rd Marquess of Winchester (1532 – 24 November 1598) was an English nobleman, the son of John Paulet, 2nd Marquess of Winchester and his first wife, Elizabeth Willoughby.
His maternal grandfather was Robert Willoughby, 2nd Baron Willoughby de Broke.
He was made a Knight of the Bath at the coronation of Mary I on 30 November 1553.
Richard Paulet, 17th Marquess of Winchester
Richard Charles Paulet, 17th Marquess of Winchester( born on 8 July 1905; died 5 March 1968) was the son of Charles Standish Paulet and Lillian Jane Charlotte Fosbery.
He inherited the title of 17th Marquess of Winchester from Henry Paulet, 16th Marquess of Winchester, through Charles Paulet, 13th Marquess of Winchester.
He died unmarried, and the title was passed to his 26 year old cousin Nigel Paulet, 18th Marquess of Winchester.
Simon Isaacs, 4th Marquess of Reading
Simon Rufus Isaacs, 4th Marquess of Reading( born 18 May 1942), is a British peer, banker and philanthropist.
Henry, Lord Paulet
Henry, Lord Paulet( 1602 –1672) was an English politician who sat in the House of Commons in 1626.
Paulet was the son of William Paulet, 4th Marquess of Winchester.
He was admitted at Peterhouse, Cambridge on 6 March 1618.
He was created Knight of the Bath at the Coronation of Charles I and was of Amport, Hampshire.
In 1626, he was elected Member of Parliament for Andover.
Paulet married Lucy Philpot, daughter of Sir George Philpot.
John Paulet, 2nd Marquess of Winchester
John Paulet, 2nd Marquess of Winchester( c. 1510 – 4 November 1576), styled The Honourable John Paulet between 1539 and 1550, Lord St John between 1550 and 1551 and Earl of Wiltshire between 1551 and 1555, was an English peer.
He was the eldest son of William Paulet, 1st Marquess of Winchester and Elizabeth Capel.
Christopher Lambert (MP)
Christopher Lambert, of Winchester, Hampshire, was an English politician.
He was the second son of William Lambert of Winchester and a servant of Sir William Paulet, 3rd Marquess of Winchester.
Lambert was a Member of Parliament for Bridport in 1593.
William Paulet, 4th Marquess of Winchester
William Paulet, 4th Marquess of Winchester (bef. 1560 – 4 February 1629) was an English nobleman, the son of William Paulet, 3rd Marquess of Winchester and Anne or Agnes Howard.
He was styled Lord St. John from 1576 to 1598.
He was summoned to Parliament on 16 January 1581 in his father's barony as Lord St. John.
On 24 November 1598, he succeeded his father as 4th Marquess of Winchester.
Paulet experienced great financial difficulties arising from his magnificent style of living and his lavish entertainment of Elizabeth I at Basing House.
John Hay, 4th Marquess of Tweeddale
John Hay, 4th Marquess of Tweeddale,( 16959 December 1762) was a Scottish nobleman.

Question: Who is the paternal grandfather of William Paulet, 4Th Marquess Of Winchester?
Answer: John Paulet, 2nd Marquess of Winchester