On 8 August 1746, Josef and Kristof Festetics (the two sons of the second marriage of Paul Festetics) added de Tolna to their surname (von Tolna in Austria). On 5 November 1766, Josef's eldest son Pal Festetics de Tolna (1725–1782) was made a count by Queen Maria Theresa of Hungary. On 24 February 1772, Kristof's eldest son Pal Festetics de Tolna (1722–1782) was made a count by Queen Maria Theresa of Hungary, who was also Archduchess of Austria and Holy Roman Empress. The title of count was inheritable by all male-line descendants.

On 21 June 1911, Count Tassilo Festetics de Tolna (1850–1933) was made a prince (Fürst) with the style Serene Highness (Durchlaucht) by King Francis Joseph I of Hungary. His grandson, prince Georg (born 1940) is the current head of the house and third Fürst.

In 1973, Count Dénes Festetics de Tolna (1943) was incorporated in the Dutch nobility with the title of count; the title of count(ess) is inheritable by all male-line descendants.

Among the other prominent members of the family are:

• Antal Festetics (born 1937), Austrian biologist
• Andor Festetics (1843–1930), Hungarian politician
• György Festetics (1815–1883), Hungarian politician
• Leo Festetics (1800–1884), Hungarian composer
• Sándor Festetics (1882–1956), Hungarian politician
• Tassilo Festetics de Tolna (1813-1883), Austrian general

Festetics/Feštetić may also refer to:

• the Feštetić Castle, located in Pribislavec, a village near Čakovec, Međimurje County, northern Croatia
• the Festetics Palace, located in Keszthely, Hungary
• the Festetics String Quartet, from Budapest, Hungary

• List of titled noble families in the Kingdom of Hungary

• Marek, Miroslav. "Festetics de Tolna". Genealogy.EU. - the descendants of Lukács Festetics (died before 1637)