Cornelius O'Brien

Cornelius O'Brien may refer to:

• Cornelius O'Brien (piper) (fl. 1656), Irish musician
• Cornelius O'Brien (bishop) (1843–1906), Canadian Roman Catholic priest, archbishop, and author
• Cornelius O'Brien (County Clare) (1782–1857), politician and builder of O'Brien's tower
• Cornelius J. O'Brien (1869–1954), vaudeville and minstrel show performer

1. Cornelius O'Brien (County Clare)
2. O'Brien's Tower
3. Cliffs of Moher
4. Cornelius O'Brien (piper)
5. Cornelius O'Brien (bishop)
6. Cornelius J. O'Brien
7. Summerhill, Dublin
8. Liscannor
9. John O'Brien (Irish politician)
10. Lucius O'Brien, 13th Baron Inchiquin
11. Con O'Brien (American football)
12. Clare (UK Parliament constituency)
13. Minnamurra River massacre
14. James O'Brien (1806–1882)
15. Edward Joseph McCarthy
16. List of UK minor party and independent MPs elected
17. Michael Hannan (bishop)
18. Saint Mary's University (Halifax)
19. Francis Macnamara Calcutt
20. Beulah, Gilead