Serena Armstrong-Jones, Countess of Snowdon
Serena Alleyne Armstrong- Jones, Countess of Snowdon(" née" Stanhope; born 1 March 1970) is an Anglo- Irish aristocrat and the daughter- in- law of Princess Margaret, Countess of Snowdon, and a niece- by- marriage of Queen Elizabeth II and Prince Philip, Duke of Edinburgh.
Margaret of Valois, Countess of Blois
Margaret of Valois( 1295–1342) was a French noblewoman.
She was a daughter of Charles, Count of Valois, and his first wife, Margaret, Countess of Anjou.
She was also a sister of King Philip VI of France.
In 1310, she married Guy I, Count of Blois.
They had three children together:
Joan of Valois, Countess of Hainaut
Joan of Valois( c. 1294 – 7 March 1342) was a Countess consort of Hainaut, Holland, and Zeeland.
She was the second eldest daughter of the French prince Charles, Count of Valois, and his first wife, Margaret, Countess of Anjou.
As the sister of King Philip VI of France and the mother- in- law of Edward III, she was ideally placed to act as mediator between them.
Marie of Blois, Duchess of Anjou
Marie of Blois( 1345- 1404) was a daughter of Joanna, Duchess of Brittany and Charles, Duke of Brittany.
Through marriage to Louis I, Duke of Anjou, she became Duchess of Anjou, Countess of Maine, Duchess of Touraine, titular Queen of Naples and Jerusalem and Countess of Provence.
Charles II of Naples
Charles II, also known as Charles the Lame (1254 – 5 May 1309), was King of Naples, Count of Provence and Forcalquier (1285–1309), Prince of Achaea (1285–1289), and Count of Anjou and Maine (1285–1290); he also styled himself King of Albania and claimed the Kingdom of Jerusalem from 1285.
He was the son of Charles
I of Anjouone of the most powerful European monarchs in the second half of the 13th centuryand Beatrice of Provence.
His father granted Charles the Principality of Salerno in the Kingdom of Sicily (or "Regno") in 1272 and made him regent in Provence and Forcalquier in 1279.
After the uprising known as the Sicilian Vespers against Charles' father, the island of Sicily became an independent kingdom under the rule of Peter III of Aragon in 1282.
A year later, his father made Charles regent in the mainland territories of the "Regno" (or the Kingdom of Naples).
Charles held a general assembly where unpopular taxes were abolished and the liberties of the noblemen and clerics were confirmed.
He could not prevent the Aragonese from occupying Calabria and the islands in the Gulf of Naples.
The Sicilian admiral, Roger of Lauria, captured him in a naval battle near Naples in 1284.
As he was still in prison when his father died on 7 January 1285, his realms were ruled by regents.
Nicholas Vaux, 1st Baron Vaux of Harrowden
Nicholas Vaux, 1st Baron Vaux of Harrowden( c. 1460 – 14 May 1523) was a soldier and courtier in England and an early member of the House of Commons.
He was the son of Lancastrian loyalists, Sir William Vaux of Harrowden and Katherine Penyson( or Peniston as she is sometimes called in later sources), a lady of the household of Queen Margaret of Anjou, wife of the Lancastrian king, Henry VI of England.
Katherine was daughter of Gregorio Panizzone of Courticelle( modern Cortiglione), in Piedmont, Italy which was at that time subject to King René of Anjou, father of Queen Margaret of Anjou, as ruler of Provence.
He grew up during the years of Yorkist rule, and later served under the founder of the Tudor dynasty, Henry VII.
Ermengarde-Gerberga of Anjou
Ermengarde- Gerberga of Anjou, also called Ermengarde of Anjou, was the Countess of Rennes, Regent of Brittany( 992–994) and also Countess of Angoulême.
Margaret, Countess of Vertus
Margaret, Countess of Vertus( French:" Marguerite d' Orléans"; 4 December 1406 – 1466), was a French vassal, Countess of Vertus and Etampes 1420 – 1466.
She was the daughter of Louis I, Duke of Orléans, and Valentina Visconti.
Fulk II, Count of Anjou
Fulk II of Anjou( c. 905 — 960), called(" the Good") was Count of Anjou from 942 to his death.
Margaret, Countess of Anjou
Margaret, Countess of Anjou (1272 – 31 December 1299) was Countess of Anjou and Maine in her own right and Countess of Valois, Alençon, Chartres and Perche by marriage.
Margaret's father was King Charles II of Naples, whilst her husband was Charles of Valois, and her older brother was Saint Louis of Toulouse; her nephew was Charles I of Hungary.

Question: What nationality is Margaret, Countess Of Anjou's father?
Answer: Kingdom of Sicily