Lord Charles Cavendish
Lord Charles Cavendish FRS (17 March 1704 – 28 April 1783) was a British nobleman and Whig politician.
Cavendish was the youngest son of William Cavendish, 2nd Duke of Devonshire, and Rachel Russell.
On 9 January 1727, Lord Charles Cavendish married Lady Anne de Grey (died 20 September 1733), daughter of Henry Grey, 1st Duke of Kent, and Jemima, his first wife.
They had two children: Henry Cavendish (1731–1810), considered one of the most accomplished physicists and chemists of his era, and Frederick Cavendish (1733–1812).
Cavendish entered the House of Commons for Heytesbury in 1725 and would remain a member in various seats until 1741, when he turned the "family seat" of Derbyshire over to his nephew William Cavendish, Marquess of Hartington.
John Wiens
John A. Wiens is an American ecologist.
His research has focused on birds and insects in semiarid environments on several continents, emphasizing community ecology and spatial relationships.
He is a pioneer in the field of landscape ecology (encompassing geographic and land-use patterns in the study of ecosystems).
John Wiens was the 2005 recipient of the Cooper Ornithological Society’s Loye and Alden Miller Research Award, which is given in recognition of lifetime achievement in ornithological research.
He was Chief Conservation Science Officer at PRBO Conservation Science from 2008 - 2012.
Charles Cavendish, 3rd Baron Chesham
Brigadier General Charles Compton William Cavendish, 3rd Baron Chesham( 13 December 1850 – 9 November 1907), styled The Honourable Charles Cavendish between 1863 and 1882, was a British soldier, courtier and Conservative politician.
He served as the last Master of the Buckhounds under Lord Salisbury from 1900 to 1901.
Charles Cavendish, 7th Baron Chesham
Charles Gray Compton Cavendish, 7th Baron Chesham( born 11 November 1974 in Sydney, Australia), is the present Baron Chesham having succeeded to the title on 27 August 2009 on the death of his father, Nicholas Cavendish, 6th Baron Chesham.
A member of the Cavendish family headed by the Duke of Devonshire, he was the first son of Nicholas Charles Cavendish and Suzanne Adrienne Byrne, his second wife whom he married in 1973.
Lord Chesham is in remainder to the Dukedom of Devonshire.
The Gray connection in Charles and his younger brother William's names comes from his mother's ancestor John Gray( 15 April 1821 to 6 September 1892).
John emigrated to Australia from Lowtherstown, Northern Ireland on board the" Wilson" in 1842 with his parents William and Margaret Gray.
Lord Chesham, who attended The King's School, Parramatta, is a keen sportsman and enjoys tennis, wind surfing, soccer, shooting and skiing.
He is also a member of the Haberdashers' Company of the City of London.
William Cavendish, 2nd Earl of Devonshire
William Cavendish, 2nd Earl of Devonshire MP( c. 1590 – 20 June 1628) was an English nobleman, courtier, and politician who sat in the House of Commons from 1614 until 1626 when he succeeded to the peerage and sat in the House of Lords.
Blanche Cavendish, Countess of Burlington
Blanche Cavendish, Countess of Burlington(" née" Howard; 11 January 1812 – 27 April 1840) was the wife of William Cavendish, 2nd Earl of Burlington, who would later become the 7th Duke of Devonshire.
Richard Cavendish, 2nd Baron Waterpark
Richard Cavendish, 2nd Baron Waterpark FSA( 13 July 1765 – 1 June 1830), was an Anglo- Irish politician and peer.
William Cavendish, 2nd Duke of Devonshire
William Cavendish, 2nd Duke of Devonshire( 1672 – 4 June 1729) was a British nobleman and politician.
He was the eldest son of William Cavendish, 1st Duke of Devonshire and Lady Mary Butler.
A prominent Whig, he was sworn of the Privy Council in 1707, and served as Lord President of the Council from 1716 to 1717 and 1725 to 1729.
He married The Hon. Rachel Russell( 1674 – 1725), daughter of William Russell, Lord Russell on 21 June 1688.
They had five children:
Charles Cavendish, 1st Baron Chesham
Charles Compton Cavendish, 1st Baron Chesham( 28 August 1793 – 12 November 1863) was a British Liberal politician.
Cavendish was the fourth son of George Augustus Henry Cavendish, 1st Earl of Burlington, third son of the former Prime Minister William Cavendish, 4th Duke of Devonshire, and his wife Lady Charlotte Elizabeth Boyle, daughter of the architect Richard Boyle, 3rd Earl of Burlington and 4th Earl of Cork.
His mother was Lady Elizabeth Compton, daughter of Charles Compton, 7th Earl of Northampton.
In 1814, at the age of 21, Cavendish was elected Member of Parliament for Aylesbury, a seat he held until 1818, and later sat for Newtown from 1821 to 1830, for Yarmouth( Isle of Wight) from 1831 to 1832, for East Sussex from 1832 to 1841, for Youghal from 1841 to 1847 and for Buckinghamshire from 1847 to 1857.
In 1858 he was raised to the peerage as Baron Chesham, of Chesham in the County of Buckingham.
Lord Chesham married Lady Catherine Susan Gordon, daughter of George Gordon, 9th Marquess of Huntly, in 1814.
He died in November 1863, aged 70.
He was succeeded in the barony by his son William George Cavendish.
William Cavendish, 2nd Baron Chesham
William George Cavendish, 2nd Baron Chesham( 29 October 1815 – 26 June 1882) was a British Liberal politician.
A member of the Cavendish family headed by the Duke of Devonshire, Chesham was the son of Charles Compton Cavendish, 1st Baron Chesham, and Lady Catherine Susan Gordon, daughter of George Gordon, 9th Marquess of Huntly.
In 1847, he was elected Member of Parliament for Peterborough, a seat he held until 1852, and later represented Buckinghamshire from 1857 to 1863, when he succeeded his father in the barony and took his seat in the House of Lords.
In 1849, Lord Chesham married Henrietta Frances Lascelles, daughter of William Lascelles and his wife Lady Caroline Georgiana Howard, daughter of George Howard, 6th Earl of Carlisle.
He died in June 1882, aged 66, and was succeeded in the barony by his eldest son Charles Compton William Cavendish.
His daughter Katherine Cavendish( 1857– 1941) married Hugh Grosvenor, 1st Duke of Westminster, as his second wife.

Question: Are William Cavendish, 2nd Baron Chesham and John Wiens both from the same country?
Answer: no