Barnaby Fitzpatrick (Irish: Brian Mac Giolla Phádraig), 6th Baron Upper Ossory, (d. 1666) was the heir and successor of Barnaby Fitzpatrick, 5th Baron Upper Ossory. [1] The eldest son of Barnaby Fitzpatrick by his wife Margaret Butler, he took his seat in Parliament on 16 March 1639. He married Catherine Everard, daughter of Sir Edward Everard, [2] and his heir was his eldest son, Barnaby.