Thomas Percy, 1st Earl of Worcester
Thomas Percy, 1st Earl of Worcester, KG (134323 July 1403) was an English medieval nobleman and naval commander best known for leading the rebellion with his nephew Henry Percy, known as 'Harry Hotspur', and his elder brother, Henry Percy, 1st Earl of Northumberland.
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:
Patrick Ruthven, 1st Earl of Forth
Patrick Ruthven, 1st Earl of Forth and 1st Earl of Brentford( c. 1573 – 2 February 1651) was a Scottish nobleman, general, and diplomat.
Waleran de Beaumont, 1st Earl of Worcester
Waleran de Beaumont, Count of Meulan, 1st Earl of Worcester( 1104 – 9 April 1166, Preaux), was the son of Robert de Beaumont, 1st Earl of Leicester and Elizabeth de Vermandois, and the twin brother of Robert de Beaumont, 2nd Earl of Leicester.
He is not referred to by any surname in a contemporary document other than' Waleran son of Count Robert'.
Thomas Boleyn, 1st Earl of Wiltshire
Thomas Boleyn, 1st Earl of Wiltshire, 1st Earl of Ormond, 1st Viscount Rochford( c. 1477 – 12 March 1539), of Hever Castle in Kent, was an English diplomat and politician who was the father of Anne Boleyn, Queen Consort and the second wife of King Henry VIII, and was thus the maternal grandfather of Queen Elizabeth I of England.
Robert Stewart, 1st Earl of March
Robert Stewart, 1st Earl of Lennox then 1st Earl of March( c. 152229 March 1586) was a Scottish nobleman of the family of Stewart of Darnley.
Humphrey de Bohun, 2nd Earl of Hereford
Humphrey( IV) de Bohun( 1204 – 24 September 1275) was 2nd Earl of Hereford and 1st Earl of Essex, as well as Constable of England.
He was the son of Henry de Bohun, 1st Earl of Hereford, and Maud FitzGeoffrey.
Claude Bowes-Lyon, 14th Earl of Strathmore and Kinghorne
Claude George Bowes- Lyon, 14th and 1st Earl of Strathmore and Kinghorne,( 14 March 1855 – 7 November 1944), styled as Lord Glamis from 1865 to 1904, was a British peer and landowner who was the father of Queen Elizabeth of the United Kingdom later known as The Queen Mother and the maternal grandfather of Queen Elizabeth II.
From 1937 he was known as" 14th and 1st Earl of Strathmore and Kinghorne", as he was the 14th Earl in the peerage of Scotland but the 1st Earl in the peerage of the United Kingdom.
Obata Toramori
He was the father of Obata Masamori.
Henry Percy, 1st Earl of Northumberland
Henry Percy, 1st Earl of Northumberland, 4th Baron Percy, titular King of Mann, KG, Lord Marshal (10 November 134120 February 1408) was the son of Henry de Percy, 3rd Baron Percy, and a descendant of Henry III of England.
His mother was Mary of Lancaster, daughter of Henry, 3rd Earl of Lancaster, son of Edmund, Earl of Leicester and Lancaster, who was the son of Henry III.

Question: Who is Thomas Percy, 1St Earl Of Worcester's father?
Answer: Henry de Percy, 3rd Baron Percy