John FitzGerald, 4th Earl of Desmond
John FitzGerald, 4th Earl of Desmond( died 1399) was the son of Gerald FitzGerald, 3rd Earl of Desmond.
He married and had one son, Thomas, who succeeded him as Earl of Desmond.
According to Burke, John FitzGerald married Joan Roche, the daughter of Lord Fermoy.
In March 1399 FitzGerald drowned at Ardfinnan on the River Suir, and was buried at Youghal.
He was succeeded by his son Thomas FitzJohn FitzGerald, 5th Earl of Desmond.
Desmond Guinness
The Hon.
Desmond Walter Guinness (born 8 September 1931) is an Anglo-Irish author on Georgian Art and Architecture and a conservationist.
He is the second son of the author and brewer Bryan Guinness, 2nd Baron Moyne and Diana Mitford (later Lady Mosley).
He was educated at Eton, Gordonstoun and Christ Church, Oxford.
In 1958, he bought Leixlip Castle, Leixlip, County Kildare, Ireland, where he continues to live with his second wife, the former Penelope Cuthbertson, whom he married in 1984.
As a member of the extended Guinness family, he has a number of well-known relatives, such as Garech Browne.
He has been Master of the North Kildare Harriers.
Diana Mitford
Diana, the Hon.
Lady Mosley (17 June 191011 August 2003), born Diana Freeman-Mitford and usually known as Diana Mitford, was one of the Mitford sisters.
She was first married to Bryan Walter Guinness, heir to the barony of Moyne, and with whom she was part of the Bright young things social group of Bohemian young aristocrats and socialites in 1920s London.
Her marriage ended in divorce as she was pursuing a relationship with Sir Oswald Mosley, 6th Baronet of Ancoats, leader of the British Union of Fascists.
She married Mosley at the home of Joseph Goebbels in 1936, with Adolf Hitler as guest of honour.
Subsequently, her involvement with Fascist political causes resulted in three years' internment during the Second World War.
She later moved to Paris and enjoyed some success as a writer.
In the 1950s she contributed diaries to "Tatler" and edited the magazine "The European".
In 1977, she published her autobiography, "A Life of Contrasts", and two more biographies in the 1980s.
Her appearance on the BBC's Desert Island Discs in 1989 was controversial.
She was also a regular book reviewer for "Books & Bookmen" and later at "The Evening Standard" in the 1990s.
A family friend, James Lees-Milne, wrote of her beauty, "She was the nearest thing to Botticelli's Venus that I have ever seen".
She was described as "unrepentant" about her previous political associations by obituary writers such as the historian Andrew Roberts.
Minamoto no Chikako
She was the mother of Prince Morinaga.
Maurice FitzGerald, 9th Earl of Desmond
Maurice FitzGerald, 9th Earl of Desmond( died 1520) was the brother of James FitzGerald, 8th Earl of Desmond.
Peter Guinness (actor)
Peter Guinness( born 14 August 1950) is an English film, television and theatre actor.
Os Guinness
Os Guinness( born September 1941) is an English author and social critic.
He has lived in the United States since 1984.
John FitzGerald, de facto 12th Earl of Desmond
John FitzGerald, de facto 12th Earl of Desmond( died December 1536) was the brother of Thomas FitzGerald, 11th Earl of Desmond.
Upon his brother's death in 1534, John disputed the title to the earldom of his brother's grandson, James FitzGerald, de jure 12th Earl of Desmond.
According to the" Annals of the Four Masters", John FitzThomas FitzGerald was believed to have instigated the murder of his older brother, James FitzGerald, 8th Earl of Desmond in 1487, and had been expelled by his brother Maurice FitzGerald, 9th Earl of Desmond.
< ref>[ https://books.google.com/books?id=DdhC3eVIdHgC&pg=PA530&dq=James+FitzGerald,+8th+Earl+of+Desmond&hl=en&sa=X&ved=0ahUKEwjDkbTshJjZAhVPrVkKHVoGDLc4FBDoAQg_MAQ#v=onepage&q=
James FitzGerald, 8th Earl of Desmond&f= false Connellan, Owen.
" The Annals of Ireland[ from A.D. 1171 to A.D. 1616", Dublin.
Brian Geraghty, 1846, p. 309]
Patrick Guinness
Patrick Desmond Carl Alexander Guinness, KCEG KLJ( born 1 August 1956 in Dublin) is an Irish historian and author and one of heirs of the Guinness business dynasty.
Son of Desmond Guinness and Marie- Gabrielle von Urach, he was educated at Winchester College and Trinity College Dublin.
He is a financial analyst.
He formerly represented Sotheby's in Ireland.
Maurice FitzGerald, 2nd Earl of Desmond
Maurice FitzMaurice FitzGerald, 2nd Earl of Desmond( d. 1358)( Maurice Óg) was the son of Maurice FitzGerald, 1st Earl of Desmond, and his first wife, Catherine de Burgh.
( Some sources list her as Margaret.)
The 2nd Earl married Beatrice de Stafford, daughter of Ralph de Stafford, 1st Earl of Stafford and Margaret Audley, but died without any male issue, and was therefore succeeded in the Earldom of Desmond by his half- brother Gerald FitzGerald, 3rd Earl of Desmond.
FitzGerald's widow married
Thomas de Ros, 4th Baron de Ros around a year after FitzGerald's death.

Question: What is the place of birth of Desmond Guinness's mother?
Answer: London