Namesakes
Fictional Characters from Books:
1 character
Ignatius J. Reilly 1980 A Confederacy of Dunces 
Hall-of-Famers:
1 football
(football) Art McNally (middle name Ignatius) 2022
Harry Potter Characters:
1 character
Percy Weasley (middle name Ignatius)
Notable Musicians:
1 musician
Jim Corr (middle name Ignatius) 1964-
Olympic Medalists:
1 gold
(gold) Lisette Sevens (middle name Ignatius) 1984 field hockey
Other Royalty:
1 archduke
Maximilian Eugen of Austria (middle name Ignatius) 1895-1919 Austria-Hungary
Saints:
6 saints, 4 blessed
Saint Ignatius of Antioch 35-107
Saint Ignatius of Constantinople 797-877
Saint Ignatius of Loyola 1491-1556
Blessed Inácio de Azevedo (a.k.a. Ignatius) 1527-1570
Saint Ignatius Jorjes ?-1597
Saint Ignazio of Laconi (a.k.a. Ignatius) 1701-1781
Saint Ignacio Delgado y Cebrian (a.k.a. Ignatius) 1761-1838
Blessed Edmund Ignatius Rice 1762-1844
Blessed Ignatius Maloyan 1869-1915
Blessed Leo Ignatius Mangin ?-1900