Barons Upper Ossory in the Peerage of Ireland (1541-1691)
Barons Upper Ossory
- Barnaby Fitzpatrick, 1st Baron Upper Ossory (c. 1485–1575)
- Barnaby Fitzpatrick, 2nd Baron Upper Ossory (c. 1535–1581)
- Florence Fitzpatrick, 3rd Baron Upper Ossory (died 1613)
- Teigh or Thady Fitzpatrick, 4th Baron Upper Ossory (died 1627)
- Barnaby Fitzpatrick, 5th Baron Upper Ossory (died c. 1638)
- Barnaby Fitzpatrick, 6th Baron Upper Ossory (died c. 1666)
- Barnaby Fitzpatrick, 7th Baron Upper Ossory (died 1696) attainted 1691.
Barons Gowran in the Peerage of Ireland (1715-1818)
Earls of Upper Ossory in the Peerage of Ireland (1751-1818)
Baron Upper Ossory of Ampthill in the Peerage of Great Britain (1794-1818)
Earls of Upper Ossory
- Richard FitzPatrick, 1st Baron Gowran (c. 1662–1727)
- John FitzPatrick, 1st Earl of Upper Ossory, 2nd Baron Gowran (1719–1758)
- John FitzPatrick, 2nd Earl of Upper Ossory, 1st Baron Upper Ossory of Ampthill (1745–1818)
Barons Castletown of Upper Ossory in the Peerage of the United Kingdom (1869-1937)
Barons Castletown of Upper Ossory
- John Wilson later FitzPatrick, 1st Baron Castletown (1811–1883) llegitimate son of John FitzPatrick, 2nd Earl of Upper Ossory and took the name and arms of FitzPatrick by Royal Warrant 1842.
- Bernard Edward Barnaby FitzPatrick, 2nd Baron Castletown KP (1849–1937)