Ferdinand III, Grand Duke of Tuscany, or, more fully, His Imperial and Royal Highness Ferdinando III Giuseppe Giovanni Baptista Grand Duke of Tuscany, Archduke of Austria, Prince of Hungary and Bohemia, (May 6, 1769, Florence, Italy - June 18, 1824, Florence, Italy), was son of Leopold II of Austria (1747-1792) and his wife Maria Luisa of Spain (1745-1792)
He married, firstly, on August 15, 1790, at Naples, Italy, Luisa Maria Amelia Teresa of the Two Sicilies (July 27, 1773 - September 19, 1802), daughter of Fernando I of the Two Sicilies (1751-1825) and his wife Marie Caroline of Austria (1752-1814)
Their children were:
- Carolina Ferdinanda Theresia (1793-1802)
- Franz Leopold (1794-1800)
- Leopold II (1797-1870)
- Marie Louise Josephe Christine Rose (1799-1857)
- Maria Teresa (1801-1855)
- [?] (1802-1802)
There were no children of this second marriage.