Question: Of what relation is Irina Mikhailovna Raievskya to the great-great grandson and historic heir of Wilhelm II?

Context paragraphs:
Irina Mikhailovna of Russia: Irina Mikhailovna (Russian: Ирина Михайловна ; 22 April 1627 – 8 February 1679), was a Russian Tsarevna, the eldest daughter of Tsar Michael of Russia from his second marriage to Eudoxia Streshneva, a noblewoman from Mozhaysk.  She was the elder sister of Alexis of Russia.

Irina Dobryakova: Irina Mikhailovna Dobrekova (Russian: Ири́на Миха́йловна Добряко́ва ; born 16 February 1931, Leningrad, USSR) is a Soviet Russian painter, graphic artist, living and working in Saint Petersburg, a member of the Saint Petersburg Union of Artists (before 1992 named as the Leningrad branch of Union of Artists of Russian Federation), regarded as a representative of the Leningrad school of painting.

Irina Baldina: Irina Mikhailovna Baldina (Russian: Ири́на Миха́йловна Ба́лдина ; May 18, 1922, Moscow, Soviet Russia – January 15, 2009, Saint Petersburg, Russia) was a Soviet Russian painter who lived and worked in Leningrad, was a member of the Saint Petersburg Union of Artists (before 1992 the Leningrad branch of Union of Artists of Russian Federation), and is regarded as a representative of the Leningrad school of painting.

Tokugawa Ienobu: Tokugawa Ienobu (徳川 家宣 ) (June 11, 1662 – November 12, 1712) was the sixth shogun of the Tokugawa dynasty of Japan.  He was the eldest son of Tokugawa Tsunashige, thus making him the nephew of Tokugawa Ietsuna and Tokugawa Tsunayoshi, the grandson of Tokugawa Iemitsu, the great-grandson of Tokugawa Hidetada, and the great-great grandson of Tokugawa Ieyasu.  All of Ienobu's children died young.

Georg Friedrich, Prince of Prussia: Georg Friedrich Ferdinand, Prince of Prussia (German: "Georg Friedrich Ferdinand Prinz von Preußen"; born 10 June 1976), is the current head of the House of Hohenzollern, the former ruling dynasty of the German Empire and of the Kingdom of Prussia.  He is the great-great-grandson and historic heir of Wilhelm II, the last German Emperor and King of Prussia, who was deposed and went into exile upon Germany's defeat in World War I in 1918.

Irina Mikhailovna Raievskya: Irina Mikhailovna Raievskya (18 August 1892 - 22 January 1955), (Russian: Раевская, Ирина Михайловна ), was Duchess of Mecklenburg, her second husband George, Duke of Mecklenburg (German: "Georg Herzog zu Mecklenburg" ) was the head of the House of Mecklenburg-Strelitz from 1934 until his death 1963.  Irina is the great-grandmother of Sophie, Princess of Prussia, wife of Georg Friedrich, Prince of Prussia current head of the House of Hohenzollern.

Al-Mansur Muhammad II: Al Mansur Muhammad II was the Ayyubid emir of Hama 1244-1284, son of Al-Muzaffar Mahmud and grandson of Mansur Muhammad I.  He was the great-great grandson of Saladin’s brother Nur ad-Din Shahanshah.  His mother was Ghaziya Khatun.

Gunston Hall (Biltmore Forest, North Carolina): Gunston Hall, also known as Franklin Hall, is a historic estate and a national historic district located at Biltmore Forest, Buncombe County, North Carolina.  The district encompasses five contributing buildings, one contributing site, and two contributing structures.  The main house was designed by noted architect Waddy Butler Wood and built in 1923.  It is a five-part Colonial Revival style dwelling consisting of a 1 1/2-story main block flanked by hyphens and 1 1/2-story wings.  The grounds were designed by noted landscape architects Chauncey Beadle and Lola Anderson Dennis.  Other contributing elements are the Grounds and Garden (1920-c.  1955), the Breezeway (c. 1950), Gazebo (c. 1955), Tool Shed/Potting Shed (c. 1951), Greenhouse (c. 1954), Garden Shed (c. 1951), and Entrance Piers and Gates (1923).  The estate was built by Dr. William Beverley Mason, a great-great grandson of George Mason, who built Gunston Hall (1759).

Irina Baronova: Irina Mikhailovna Baronova FRAD (Russian: Ири́на Миха́йловна Баро́нова ; March 13, 1919 – June 28, 2008) was a Russian ballerina and actress who was one of the Baby Ballerinas of the Ballet Russe de Monte Carlo, discovered by George Balanchine in Paris in the 1930s.  She created roles in Léonide Massine's "Le Beau Danube" (1924), "Jeux d'enfants" (1932), and "Les Présages" (1933); and in Bronislava Nijinska's "Les Cent Baisers" (1935).

Tokugawa Ietsugu: Tokugawa Ietsugu; 徳川 家継 (August 8, 1709 – June 19, 1716) was the seventh shogun of the Tokugawa Dynasty, who ruled from 1713 until his death in 1716.  He was the son of Tokugawa Ienobu, thus making him the grandson of Tokugawa Tsunashige, daimyo of Kofu, great-grandson of Tokugawa Iemitsu, great-great grandson of Tokugawa Hidetada, and finally the great-great-great grandson of Tokugawa Ieyasu.

Supporting paragraphs: Irina Mikhailovna Raievskya Georg Friedrich, Prince of Prussia
Answer: great-grandmother