Juan de Hoyos and his family accompanied the later Ferdinand I, Holy Roman Emperor, to Lower Austria in 1525, founding the Austro-Hungarian branch of the family. This branch rose to prominence in Austria and in Hungary as Hungarian magnates over the centuries.
The older line of the family was elevated to imperial counts in 1628, and became extinct in 1718. A younger line was elevated to imperial counts in 1674.
- Alexander, Count of Hoyos (1876-1937), Austro-Hungarian diplomat
- Marguerite, Countess of Hoyos (1871–1945), sister of Alexander; married Herbert, Prince of Bismarck and became Princess of Bismarck
- Melanie, Countess of Hoyos (1916–1947), daughter of Alexander; married her cousin Gottfried, Count von Bismarck-Schönhausen and became Countess von Bismarck-Schönhausen
- Marie Antoinette, Countess of Hoyos (1920–2004), married Prince Wilhem Victor of Prussia (1919–1989), son of Prince Adalbert of Prussia
- Ladislas de Hoyos (1939-2011), French TV journalist
- Genealogisches Handbuch des Adels, Adelslexikon Band VI, Band 91 der Gesamtreihe, S. 389-390, C. A. Starke Verlag, Limburg (Lahn) 1987, ISSN|0435-2408.
- Michael S. Habsburg-Lothringen: Die Familie Hoyos. Geschichte und Persönlichkeiten. In: Herbert Knittler (ed.): Adel im Wandel. Politik, Kultur, Konfession 1500–1700, Katalog der Niederösterreichischen Landesausstellung Rosenburg 1990. Wien 1990, ISBN 3-85460-019-4, S. 565–576.