The Princes of Ottajano (or Ottaiano) are a cadet branch of the ducal dynasty of Tuscany. Along with the Veronese Medici Counts of Caprara, and Gavardo, they make up the last and closest descendants to the main line of the House of Medici.

The founder of the Ottajano line was Ottaviano de' Medici, who married Bartholomea Giugni and gave issue to Bernardetto and Countess Constance, della Gherardesca of Donoratico. Bernardetto married Giulia de' Medici, daughter of Alessandro de' Medici, Duke of Florence, descended from Cosimo il Vecchio and Lorenzo the Magnificent of the Medici family's senior line.^[1] It was Bernardetto who bought from Gonzaga in 1567 the fiefdom of Ottaviano, located near Naples.^[2]

Over the centuries, this remaining House of Medici has reached a leading position in the aristocracy of the Kingdom of Two Sicilies. Among the members of the dynasty are leaders of the Roman Catholic Church, ambassadors, cardinals (Francesco de Medici di Ottaiano), a pope, and Don Luigi de' Medici, representative of the Kingdom of Naples at the Congress of Vienna.^[3]

In his book "The History of My Dynasty," Ottaviano de' Medici points to Vatican law at the time and claims that either the Medici Princes of Ottaiano or the Veronese Medici should have inherited the Grand Duchy of Tuscany upon the death of last of the Medici Grand Dukes, Gian Gastone de' Medici,^[4] instead of the Habsburg-Lorraine line, since both Medici branches were closer descendants^[5] than Francis Stephen of Lorraine (Francis I, Holy Roman Emperor), who was a great-great-great-grandson of Francesco I de' Medici via the female line. However, due to the Habsburg-Lorraine influence, they were able to secure Florence for themselves.^[6]

The branch is still in existence under the current head, Giuliano de' Medici di Toscana di Ottajano, who holds the titles of 14th Prince of Ottajano and 12th Duke of Sarno.^[7] The Princes of Ottaiano and the Veronese Counts have common ancestry with most royal monarchies, and the branches are the collateral branch of the House of Medici.^[8] In the modern day, the resulting House of Medici has still maintained close ties with the remains of the House of Bonaparte.^[9]

• 1606–93 Ottaviano de' Medici, 1st Prince of Ottajano
• 1693–1717 Giuseppe de' Medici, 2nd Prince of Ottajano b. 1635
• 1717-63 Giuseppe de' Medici, 3rd Prince of Ottajano
• 1763-70 Michele de' Medici, 4th Prince of Ottajano
• 1770-28 Aug 1793 Giuseppe de' Medici, 5th Prince of Ottajano
• 28 Aug 1793-11 Aug 1832 Michele de' Medici, 6th Prince of Ottajano
• 11 Aug 1832– 1 Jan 1874 Giuseppe de' Medici, 7th Prince of Ottajano
• 1 Jan 1874–28 Feb 1883 Michele de' Medici di Ottajano, 8th Prince of Ottajano
• 28 Feb 1883– 9 Apr 1894 Giuseppe de' Medici, 9th Prince of Ottajano
• 9 Apr 1894–1912 Angelica de' Medici, 10th Princess of Ottajano
• 1912 – 7 May 1925 Alberto Marino de' Medici, 11th Prince of Ottajano
• 7 May 1925– 2 Dec 1983 Armando de' Medici, 12th Prince of Ottajano
• 2 Dec 1983–2 Feb 2015 Giovanni Battista de' Medici di Ottajano, 13th Prince of Ottajano
• 2 Feb 2015 – current Giuliano de' Medici di Ottajano, 14th Prince of Ottajano

• Famiglie de' Medici di Ottaiano e di Sarno
• Ottaviano de' Medici di Toscana di Ottajano, Storia della mia dinastia, Polistampa 2001.
• Christopher Hibbert, The House of Medici: Its Rise and Fall (Morrow, 1975)
• George Williams, Papal Genealogy: The Families And Descendants Of The Popes (McFarland 2009)
• Walper, Simone (16 Avril 2009) "Profitez des riches. Nos 3 valeurs préférées." MoneyWeek. Numerous 029

v t e House of Medici
People	Lords of Florence Cosimo "The Elder" Piero "The Gouty" Lorenzo "The Magnificent" Piero "The Brief" Giovanni, Pope Leo X Giuliano Lorenzo II Giulio (Clement VII) Ippolito Alessandro "The Moor" Dukes of Florence Alessandro "The Moor" Cosimo I Grand Dukes of Tuscany Cosimo I Francesco I Ferdinando I Cosimo II Ferdinando II Cosimo III Gian Gastone Queens of France Caterina Maria Popes Leo X Clement VII Leo XI Cardinals male line: Giovanni (Leo X) Giulio (Clement VII) Ippolito Alessandro (Leo XI) Giovanni Ferdinando I Carlo Giovan Carlo Leopoldo Francesco Maria Francesco female line: Luigi de' Rossi Giovanni Salviati Innocenzo Cybo Bernardo Salviati Niccolò Ridolfi Lorenzo Strozzi Ferrante Gonzaga Vincenzo II Gonzaga Bishops and archbishops Filippo Bernardo Antonio Giuliano Zanobi Condottieri Giovanni delle Bande Nere Don Giovanni Mattias Genealogy Genealogical tables of the House of Medici	Festina Lente
Buildings	Villas Cafaggiolo Trebbio Careggi Fiesole La Quiete Collesalvetti Poggio a Caiano Castello Mezzomonte Agnano Spedaletto La Petraia Camugliano Stabbia La Topaia Cerreto Guidi Marignolle Arena Metato Poggio Imperiale Lapeggi L'Ambrogiana La Màgia Liliano Coltano Montevettolini Artimino Buti Seravezza Madama Palaces Casino Mediceo di San Marco Palazzo Medici Riccardi Palazzo Madama Palazzo Pitti Villa Medici Palazzo Medici Tornaquinci Livorno Palazzo delle Vedove Pisa Materdei Palazzo Medici di Ottaviano Fountains and gardens Medici fountain Villa di Pratolino Fortresses Arezzo Grosseto Piombino Pistoia San Piero a Sieve Siena Volterra Chapels Magi Chapel Medici Chapels, San Lorenzo New Sacristy Cappella dei Principi Old Sacristy
Patronage	Painters, sculptors and architects Bartolomeo Ammannati Sandro Botticelli Filippo Brunelleschi Michelangelo Michelangelo and the Medici Bernardo Buontalenti Leonardo da Vinci Donatello Michelozzo Antonio del Pollaiuolo Jacopo della Quercia Giorgio Vasari Poets and other literary figures Agnolo Poliziano Niccolò Machiavelli Humanists and philosophers Pico della Mirandola Marsilio Ficino Scientists Galileo Galilei Musicians Emilio de' Cavalieri Jacopo Peri
Heraldry	Medici coat of arms Crown of the Grand Duke of Tuscany Order of Saint Stephen
Institutions	Medici Bank
Art	Medici lions Medici porcelain Medici Vase Venus de' Medici Arazzeria Medicea
Related	Medici giraffe Galilean moons Stories set to music: "opera" Albizzi Pazzi conspiracy Savonarola TV series episodes