Prince Louis, Count of Trani
Prince" Louis" Maria of Bourbon- Two Sicilies, Count of Trani( 1 August 1838, Naples – 8 June 1886, Paris) was the eldest son of Ferdinand II of the Two Sicilies and his second wife Archduchess Maria Theresa of Austria.
His maternal grandparents were Archduke Charles, Duke of Teschen and Princess Henrietta of Nassau- Weilburg, Duchess of Teschen.
The Duke of Teschen was a son of Leopold II, Holy Roman Emperor.
The Duchess of Teschen was a great- granddaughter of Anne, Princess Royal and Princess of Orange, herself a daughter of George II of the United Kingdom.
Marie of Lorraine
Marie de Lorraine( 12 August 1674 – 30 October 1724) was a princess of the House of Lorraine- Guise and Princess of Monaco as consort of Antonio I of Monaco.
She was the mother of Louise Hippolyte Grimaldi, the only sovereign Princess of Monaco.
William II, Prince of Orange
William II (27 May 1626 – 6 November 1650) was sovereign Prince of Orange and Stadtholder of Holland, Zeeland, Utrecht, Guelders, Overijssel and Groningen in the United Provinces of the Netherlands from 14 March 1647 until his death three years later.
His only child, William III, reigned as King of England, Ireland, and Scotland.
Gerald David Lascelles
Gerald David Lascelles( 21 August 1924 – 27 February 1998) was the younger son of Henry Lascelles, 6th Earl of Harewood and Mary, Princess Royal, the only daughter of King George V and Queen Mary.
He was a first cousin of Queen Elizabeth II.
He was styled" The Honourable" Gerald Lascelles.
Mary, Princess Royal and Princess of Orange
Mary, Princess Royal
(Mary Henrietta; 4 November 1631 – 24 December 1660) was Countess of Nassau by marriage to Prince William II, and co-regent for her son during his minority as Sovereign Prince of Orange from 1651 to 1660.
She was the eldest daughter of King Charles I of England, Scotland, and Ireland and his wife, Henrietta Maria of France.
Her only child, William succeeded her husband as Prince of Orange and later reigned as King of England, Ireland and Scotland.
Mary was the first daughter of a British sovereign to hold the title Princess Royal.
Henry Lascelles, 6th Earl of Harewood
Henry George Charles Lascelles, 6th Earl of Harewood,( 9 September 1882 – 24 May 1947), styled" The Honourable" Henry Lascelles before 1892 and Viscount Lascelles between 1892 and 1929, was a British soldier, peer and a Yorkshire landowner.
He was the husband of Mary, Princess Royal, and through her the son-in- law of King George V and Queen Mary and a brother- in- law to Edward VIII and George VI.
George Bright (priest)
George Bright was Dean of St Asaph from 1689 until his death in 1696.
Bright was born in Epsom and educated at Emmanuel College, Cambridge.
He was Chaplain to Mary, Princess of Orange and Rector of Loughborough.
Katherine Stanhope, Countess of Chesterfield
Katherine Stanhope, Countess of Chesterfield( 1609 – 1667) was the governess and confidante of Mary, Princess Royal and Princess of Orange, and was the first woman to hold the office of Postmaster General of England.
Frederica Henriette of Anhalt-Bernburg
Frederica Henriette of Anhalt- Bernburg( 24 January 1702–4 April 1723), was a member of the House of Ascania and Princess of Anhalt- Bernburg by birth and a Princess of Anhalt- Köthen by marriage.
Anne, Princess Royal and Princess of Orange
Anne, Princess Royal and Princess of Orange (2 November 1709 – 12 January 1759) was the second child and eldest daughter of King George II of Great Britain and his consort Caroline of Ansbach.
She was the spouse of William IV, Prince of Orange, the first hereditary stadtholder of all seven provinces of the Northern Netherlands.
She was Regent of the Netherlands from 1751 until her death in 1759, exercising extensive powers on behalf of her son William V. She was known as an Anglophile, due to her English upbringing and family connections, but was unable to convince the Dutch Republic to enter the Seven Years' War on the side of the British.
Princess Anne was the second daughter of a British sovereign to hold the title Princess Royal.
In the Netherlands she was sometimes known as Anna van Hannover.

Question: Which country Mary, Princess Royal And Princess Of Orange's husband is from?
Answer: United Provinces of the Netherlands