Salvador de Iturbide y Marzán
Salvador Agustín Francisco de Paula de Iturbide y Marzán( 18 September 1849 in Mexico City – 26 February 1895 in Ajaccio, Corsica) was the grandson of Agustín de Iturbide, the first emperor of independent Mexico, and his consort Empress Ana María.
He became the adopted son, along with his cousin Agustín de Iturbide y Green, of Mexico's only other royal heads of state — Emperor Maximilian I and Empress Carlota of Mexico.
Felipe de Iturbide y Huarte
Felipe de Jesús Andres María Guadalupe de Iturbide y Huarte( November 30, 1822 — November 19, 1853) was a nineteenth century Mexican royal.
He was bestowed the title of Mexican Prince during the First Mexican Empire by the Constituent Congress.
Agustín Jerónimo de Iturbide y Huarte
Agustín Jerónimo de Iturbide y Huarte( 30 September 1807 – 11 December 1866) was the eldest son of the first Emperor of Mexico, Agustín I of Mexico.
He was the heir apparent to the First Mexican Empire and a member of the Imperial House of Iturbide.
Later in life, he served as a military officer in South America and also worked as a diplomat for the United Mexican States at the Mexican embassy in the United States and in London, after his military career had ended in South America.
Ana María Huarte
Ana María Josefa Ramona Juana Nepomucena
Marcelina Huarte y Muñiz (17 January 1786 – 21 March 1861) was the first Empress of Mexico.
She was the wife Emperor Agustín de Iturbide of Mexico.
Her father was the provincial intendant Isidro Huarte and her mother
was the noblewoman Manuela Muñiz y Sanchez de Tagle descendant of the Marquis of Altamira.
Ángel de Iturbide y Huarte
Ángel María José Ignacio Francisco Xavier de Iturbide y Huarte( October 2, 1816 — July 21, 1872) was the second son of Agustín de Iturbide and Ana María Huarte who received the title of Mexican Prince during the First Mexican Empire by the Constituent Congress.
In 1854 he was appointed Secretary of the Mexican Legation in the United States.
He married with Alice Green Forrest, a beautiful girl from the District of Columbia, daughter of a US Army captain.
Alice was reputed to be one of the great beauties of American society salons during the American Civil War.
In this marriage was born Agustín de Iturbide y Green, grandson by male line of the first Mexican emperor and Heir Presumptive of Maximilian von Habsburg, emperor of Second Mexican Empire.
Josefa de Iturbide y Huarte
Josefa de Iturbide y Huarte( December 22, 1814 — December 5, 1891) was the daughter of Agustín de Iturbide and Ana María Huarte who received the title of" Mexican Princess" during the First Mexican Empire by the Constituent Congress and" Princess of Iturbide" during the Second Mexican Empire by Maximilian of Habsburg.
Salvador de Iturbide y Huarte
Salvador María de Iturbide y Huarte( 17 July 1820 – 7 June 1856) was the eighth child( and third son) of Agustín I of Mexico and Empress Ana Maria Huarte.
He was married in 1845 to" Doña" María del Rosario de Marzán y Guisasola.
His descendants, through his son Salvador de Iturbide y de Marzán, are the current pretenders to the Mexican Throne.
He was in the Secretary Mexican Legation in Washington, D.C. in 1849.
Juana de Iturbide y Huarte
Juana de Dios
María Francisca Ramona Ignacia de Iturbide y Huarte( 10 March 1812 – 2 October 1828), was the third child of Agustín I of Mexico( Agustín de Iturbide) and Empress Ana María.
She died at a young age at the Georgetown Visitation Monastery( Georgetown Visitation Preparatory School) in Washington, D.C ..
María de Jesús de Iturbide
María de Jesús de las Angustias Juana Nepomuceno de Iturbide y Huarte( February 22, 1818 — July 10, 1849) was daughter of Agustín de Iturbide and Ana María Huarte who received the title of Mexican Princess during the First Mexican Empire by the Constituent Congress.
She was better known as Isis.
Her Highness, the Princess Isis de Iturbide took the habits of a nun in exile in the United States.
Sabina de Iturbide y Huarte
Sabina de Iturbide y Huarte (30 December 1810 — 15 July 1871) was the daughter of Agustín de Iturbide and
Ana María Huarte who received the title of Mexican Princess during the First Mexican Empire by the Constituent Congress.
She was the eldest daughter of Agustín de Iturbide and Ana María de Huarte y Muñiz.
She was given the title of Mexican princess when her father was elected as the Mexican Emperor.
She given the style of Highness, as the style of Imperial Highness was reserved for only the Prince Imperial of Mexico, the heir apparent to the throne.
This position was held by her brother Agustín Jerónimo de Iturbide y Huarte.

Question: Who is Sabina De Iturbide Y Huarte's maternal grandfather?
Answer: Isidro Huarte