William Douglas-Hamilton, 12th Duke of Hamilton
William Alexander Louis Stephen Douglas- Hamilton, 12th Duke of Hamilton, 9th Duke of Brandon, 2nd Duke of Châtellerault KT( 12 March 1845 in London – 16 May 1895 in Algiers) was a Scottish nobleman.
Felipe Antonio Spinola, 4th Marquis of the Balbases
Carlo Filippo Antonio Spinola y Colonna, 4th Marquis of the Balbases( Madrid, Spain, 11 November 1665 – 30 July 1721), was Viceroy of Sicily from 1707 to 1713, during the Spanish Succession War.
He was the eldest son of Paolo Spinola, 3rd Marquis of the Balbases, Governor of the Duchy of Milan from 1668 to 1670.
After his father's death, he became 4th Duke of Sesto and 4th Marquis of the Balbases.
His mother, Anna Colonna( 1629 – 1686), was a daughter of Marcantonio V Colonna, Prince of Paliano during the period 1639 – 1659.
He married, Madrid, 20 September 1682, Isabel María de la Cerda y Aragón( 1667 – 1707), a daughter of Juan Francisco de la Cerda, 8th Duke of Medinaceli( 1637 – 1691), and Catalina de Aragón- Folch de Cardona, duchess of Cardona, Segorbe, and Lerma, having 2 sons and 7 daughters, as well as three bastards, one male, 2 females.
The eldest son, 5th Duke of Sesto and 5th Marquis of the Balbases from 1721, was Ambrosio Gaetano Spinola y de la Cerda( Milan, Italy, 20 January 1696 – 1757), who became a Knight of the Order of the Golden Fleece in 1737.
After the Treaty of Utrecht, Spinola and his troops were ordered to leave Sicily and sail to Barcelona, where they played an important role in the Siege of Barcelona( 1713 – 14).
Spinola was the dedicatee of Tomaso Albinoni's" 12 Concerti a cinque", Op. 5( 1707), and of Giacomo Facco's" 12 Concerti a cinque" Pensieri Adriarmonici, Op. 1( 1716–1719).
Oliver Morton Dickerson
Oliver Morton Dickerson (September 8, 1875 – November 26, 1966) was an American historian, author, and educator.
Like his fellow historians Charles McLean Andrews and Lawrence Henry Gipson, Dickerson was a proponent of the "Imperial school" of historians who believed that the American colonies could not be studied or understood except as part of the British Empire.
Among his publications were works on the British Board of Trade, the Navigation Acts, and Boston under military rule.
Gregorio María de Silva y Mendoza, 9th Duke of the Infantado
Gregorio de Silva y Mendoza( born 1649, Pastrana- d. 1693, Madrid) was a Spanish noble from the House of Mendoza.
He was the 5th Duke of Pastrana 9th Duke of the Infantado, 7th Duke of Lerma, 6th Duke of Francavilla, 5th Duke of Estremera, and the Prince of Eboli and Melito.
George Osborne, 9th Duke of Leeds
George Godolphin Osborne, 9th Duke of Leeds( 11 August 1828 – 23 December 1895) was a British peer.
Frederick Gordon-Lennox, 9th Duke of Richmond
Frederick Charles Gordon Lennox, 9th Duke of Richmond, 9th Duke of Lennox, 9th Duke of Aubigny, 4th Duke of Gordon( 5 February 1904 – 2 November 1989) was a British peer, engineer, racing driver, and motor racing promoter.
Luis Francisco de la Cerda, 9th Duke of Medinaceli
Luis Francisco de la Cerda y Aragón, 9th Duke of Medinaceli( 2 August 1660, in El Puerto de Santa María – 26 January 1711, in Pamplona), 9th Duke of Medinaceli, was a Spanish noble and politician.
José Osorio, 9th Duke of Sesto
José Osorio y Silva, 9th Duke of Sesto, 16th Duke of Alburquerque, 16th Marquess of Alcañices( 4 April 1825, Madrid- 30 December 1909, Madrid), was a Spanish nobleman, politician and army officer.
He was also known by his title Duke of Sesto, inherited from his father, and by nicknames Pepe Osorio or Pepe Alcañices.
He was head and representative of the houses of Alcañices, Alburquerque and los Balbases, causing a personal union of sixteen noble titles and four grandee titles.
He is also considered one of the most notable mayors of Madrid, serving from 1857 to 1864.
He had inherited strong monarchist convictions as a result of his education and family tradition.
During the Glorious Revolution he convinced Isabel II that the only way to re-establish the monarchy was for her to abdicate- he was the first to sign the abdication document and became so involved in the process that the queen told her son" Alfonso, shake hands with Pepe, who has managed to become king".
During the royal family's exile he paid their expenses and put his residence in Deauville at their disposal.
He then paved the way for the restoration of the monarchy and the accession of Isabel's son Alfonso XII, on which he spent much of his family fortune.
Alfonso XII came to look on him as a second father and throughout Alfonso's life José was his best friend and main advisor.
He also acted as mentor to prince Alfonso( the future Alfonso XIII) and José's wife, the Russian princess Sofía Troubetzkoya, built up support for the restoration socially among the Spanish nobility while José's friend Antonio Cánovas del Castillo consolidated support politically.
On Alfonso XII's death in 1885, José was disgraced before his widow Maria Christina of Austria and left the Spanish court.
He spent his last years back in politics as well as on business and leisure travel across Europe with his wife.
He died aged 84 in his palace of Paseo de Recoletos on the thirty- fifth anniversary of the start of the restoration of the monarchy.
He left no children and named his nephew Miguel Osorio y Martos as his heir.
Archibald Hamilton, 9th Duke of Hamilton
Archibald Hamilton, 9th Duke of Hamilton and 6th Duke of Brandon( 15 July 1740 – 16 February 1819) was a Scottish peer and politician.
Jacobo Fitz-James Stuart, 3rd Duke of Berwick
Jacobo Francisco Eduardo Fitz- James Stuart y Colón de Portugal, 3rd Duke of Berwick, 3rd Duke of Liria and Jérica, 9th Duke of Veragua, 9th Duke of la Vega( 28 December 1718 – Valencia, 30 September 1785) was a Spanish Jacobite.
On the death of his father, James Fitz- James Stuart, in 1738, he inherited his titles of Duke of Berwick and Duke of Liria and Xerica( he also possessed many other titles in both Spain and England.)
His mother was Spanish, and on her side he was a direct descendant of explorer Christopher Columbus.

Question: Are José Osorio, 9Th Duke Of Sesto and Oliver Morton Dickerson of the same nationality?
Answer: no