Prince Amedeo, 5th Duke of Aosta (Amedeo Umberto Costantino Giorgio Paolo Elena Maria Fiorenzo Zvonimir di Savoia-Aosta; born 27 September 1943) is a claimant to the headship of the House of Savoy, the family which ruled Italy from 1861 to 1946. Until 7 July 2006 Amedeo was styled Duke of Aosta; on that date he declared himself Duke of Savoy, a title that is disputed between him and his third cousin, Vittorio Emanuele, Prince of Naples. In fact, Prince Amedeo is still referred to as Duke of Aosta.

Amedeo was born at Villa della Cisterna in Florence, the only child of Prince Aimone, Duke of Aosta, formerly designated king of Croatia as Tomislav II, and of Princess Irene of Greece and Denmark.

Only three weeks before Amedeo’s birth, Italy had surrendered to the Allies. His father, then king-designate of Croatia, abdicated. Italy’s former ally, Germany, thereupon launched a military operation to occupy Italy. The infant Amedeo was arrested by the Nazis along with his mother, aunt, and two cousins, and sent to an internment camp in Austria.

When Amedeo was only four years old, his father died in exile in Buenos Aires, and he succeeded as Duke of Aosta, Prince della Cisterna e Belriguardo, Marchese di Voghera, and Count di Ponderano.

Amedeo studied at the Collegio Navale Morosini in Venice and in England. He then attended the Naval Academy in Livorno from which he graduated as an officer in the Italian Navy.

He is an Honorary Companion of the Pennsylvania Commandery of the Military Order of the Loyal Legion of the United States (MOLLUS). He was assigned insignia number 21015. He is eligible for hereditary descent in MOLLUS by right of his descent from his great grandfather, Prince Philippe, Count of Paris.

On 22 July 1964 Amedeo married Princess Claude of Orléans (born 11 December 1943) in Sintra, Portugal. She was the ninth child and fifth daughter of Henri, comte de Paris, Orléanist claimant to the French throne, and of Princess Isabelle of Orléans-Braganza. Amedeo and Claude have three children:

Princess Bianca Irene Olga Elena Isabella Fiorenza Maria of Savoy (b. Florence, 2 April 1966) married Giberto Carbonello Tiberto Maria, Count Arrivabene-Valenti-Gonzaga at San Giustino Valdarno, Tuscany, on 11 September 1988 and had issue:
Viola Moreschina Nuschi Adec Nicoletta Maria Arrivabene-Valenti-Gonzaga (b. Rome, 31 May 1991)
Vera Clementina Verde Aimone Elena Maria Arrivabene-Valenti-Gonzaga (b. Samedan, 18 August 1993)
Mafalda Violante Giovanna Olga Maria Arrivabene-Valenti-Gonzaga (b. Conegliano Veneto, 27 December 1997)
Maddalena Smeralda Brandolina Maria Arrivabene-Valenti-Gonzaga (b. Conegliano Veneto, 24 April 2000)
Leonardo Amedeo Moreschino Sai Maria Arrivabene-Valenti-Gonzaga (b. Conegliano Veneto, 5 October 2001)
Prince Aimone, Duke of Apulia (b. Florence, 13 October 1967); Aimone married in a civil ceremony on 16 September 2008, Princess Olga of Greece, daughter of Prince Michael of Greece and Denmark. The religious marriage took place on 27 September 2008 at Patmos.
Prince Umberto of Savoy-Aosta (b. Paris, 7 March 2009)
Prince Amedeo of Savoy-Aosta (b. 24 May 2011)[10]
Princess Isabella of Savoy-Aosta (b. 14 December 2012)
Princess Mafalda Giovanna Shams Maria Fiorenza Isabella of Savoy (b. Florence, 20 September 1969) married firstly at San Giustino Valdarno, 18 September 1994 Don Alessandro Ruffo di Calabria-Santapau dei principi di Palazzolo (b. Turin, 4 November 1964, a nephew of Queen Paola of Belgium), divorced without issue; Mafalda married secondly London 27 April 2001 Nobile Francesco Ferrante Carlo Napoleone, 10th Baron Lombardo di San Chirico (b. Milan 31 January 1968) and had issue:
Nob. Anna Lombardo di San Chirico (b. Milan, 11 April 1999)
Nob. Carlo Lombardo di San Chirico (b. Milan, 28 January 2001)
Nob. Elena Lombardo di San Chirico (b. Milan, 10 March 2003)
Amedeo and Claude officially separated from each other 20 July 1976. They received a civil divorce 26 April 1982, and an ecclesiastical annulment from the Roman Rota 8 January 1987.

On 30 March 1987 Amedeo married Silvia Paternò di Spedalotto (b. 31 December 1953) in the chapel of Villa Spedalotto in Bagheria, Sicily.[4] She is the daughter of Vincenzo Paternò di Spedalotto, Marchese di Reggiovanni, and of Rosanna Bellardo Ferrari. Amedeo and Silvia have no children.

Allegedly, Amadeo has an illegitimate son with Nerina Corsini, wife of Enrico Incisa della Rocchetta: Pietro Incisa della Rocchetta (born Lausanne, 30 November 1967), born just one month after his legitimate son Aimone. The parentage was never proved, and Pietro was recognized by her mother’s husband as his own. Currently, Pietro was the owner of Bodega Chacra, a vineyard who crafts exclusively Pinot Noir wines in the Río Negro Valley of northern Patagonia, Argentina.

Amedeo has an illegitimate daughter by Kyara van Ellinkhuizen: Ginevra Maria Gabriella van Ellinkhuizen (born Milan, 19 March 2006), who was born with Down syndrome. Though before her birth Amedeo had stated that he would immediately recognize her as his child and provide for her welfare, he did not do so and instead firstly asked for DNA paternity testing to be performed in order to assure the filiation, which was done. On 4 August 2006, he legally recognized his daughter, but did not provide for her welfare until ordered to do so by a judge. The attendant scandal diminished the stature of the House of Savoy and may have further eroded support for the claim of the Aosta branch among monarchists.

Amedeo and his wife Silvia live in the village of San Rocco near the town of Castiglion Fibocchi in Tuscany (about 15 km northwest of Arezzo). He is involved in various agricultural activities including the production of wine marketed under the name Vini Savoia Aosta.

Since 1997, Amedeo has been president of the International Foundation Pro Herbario Mediterraneo. From 2003 to 2006, he was president of the committee responsible for the nature reserve on the island of Vivara.