Who was Archduchess Maria Anna of Austria's grandfather on her mothers side?
Archduchess Maria Anna of Austria (1804–1858): Marie Anne Franziska Theresia Josepha Medarde of Austria (8 June 1804 – 28 December 1858) was an Archduchess of Austria and the daughter of Franz II, Holy Roman Emperor and his second wife, Maria Theresa of Naples and Sicily. Maria Theresa of Naples and Sicily:  She was the eldest daughter of Ferdinand IV & III of Naples and Sicily (later Ferdinand I of the Two Sicilies) (1751–1825) and his wife, Marie Caroline of Austria (1752–1814).
i don't know