Charles Sackville, 6th Earl of Dorset
Charles Sackville, 6th Earl of Dorset and 1st Earl of Middlesex, KG( 24 January 164329 January 1706) was an English poet and courtier.
Lionel Sackville, 1st Duke of Dorset
Lionel Cranfield Sackville, 1st Duke of Dorset( 18 January 168810 October 1765) was an English political leader and Lord Lieutenant of Ireland.
Sir William Sackville
Sir William Sackville (c.1570–1592) was an English army officer in the service of Henry IV of France, who knighted him.
He was the third son of Thomas Sackville, 1st Earl of Dorset.
In the expedition of Peregrine Bertie, 13th Baron Willoughby de Eresby, Sackville
arrived in France in September 1589, and was knighted shortly.
He then served under François de La Noue, near Paris.
He was wounded and lost his horse at the Siege of Paris in 1590.
Sackville was killed in the 1592 campaign of Henry IV, in which Spanish forces under the Duke of Parma made a landing in northern France early in the year.
He was killed, or taken, in fighting near Bures on 14 February.
John Ross of the Inner Temple, as a law student of the early 1590s, wrote a long commemorative poem for Sackville.
John Maynard (composer)
John Maynard( baptised 1577 – died in or before 1633) was an English composer at the time of James I of England, with an idiosyncratic sense of humour.
His best known work is the musical setting of" The Twelve Wonders of the World" by Sir John Davies, possibly written for a banquet arranged by the poet Thomas Sackville, 1st Earl of Dorset on the eve of Epiphany served on trenchers, large wooden plates, in sets of twelve, the underside of which were found epigrams or verses for the guests to share.
The twelve verses were set by Maynard after the poems had already gained popularity.
Richard Sackville (escheator)
Sir Richard Sackville (c. 150721 April 1566) of Ashburnham and Buckhurst in Sussex and Westenhanger in Kent; was an English administrator and Member of Parliament.
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.
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.
Anthony-Maria Browne, 2nd Viscount Montagu
Anthony- Maria Browne( 1574 – 23 October 1629) was an English peer during the Tudor and Stuart period.
He was born in 1574, the son of Anthony Browne( 22 July 1552 – 29 June 1592), eldest son of Anthony Browne, 1st Viscount Montagu, and Mary Dormer.
He became the Second Viscount Montagu at the age of 18 on the death of his grandfather in 1592, from whom he inherited an estate worth between £ 3600 and £ 5400 per annum.
In 1591 Browne married Jane Sackville, daughter of Thomas Sackville, 1st Earl of Dorset, and by her had issue:
Anthony- Maria Browne was arrested in connection with the Gunpowder Plot and spent about a year in the Tower of London.
He wrote a book on how to manage a nobleman's household entitled" A Booke of Orders and Rules".
He died on 23 October 1629 and is buried in Midhurst Church.
Thomas Sackville, 1st Earl of Dorset
Thomas Sackville, 1st Earl of Dorset (153619 April 1608) was an English statesman, poet, and dramatist.
He was the son of Richard Sackville, a cousin to Anne Boleyn.
He was a Member of Parliament and Lord High Treasurer.
Edmund Beaufort, 2nd Duke of Somerset
Edmund Beaufort, 2nd Duke of Somerset, KG( 22 May 1455), was an English nobleman and an important figure in the Wars of the Roses and in the Hundred Years' War.
He also succeeded in the title of 4th Earl of Somerset and was created 1st Earl of Dorset and 1st Marquess of Dorset( previously held by his father and later forfeited), and Count of Mortain.
He was known for his deadly rivalry with Richard of York, 3rd Duke of York.

Question: When did Thomas Sackville, 1St Earl Of Dorset's father die?
Answer: 1566