Henry O'Brien, 8th Earl of Thomond was an Irish peer, Member of Parliament and Chief of Clan O'Brien.
- Occupation
- politician
- Position held
- member of the 3rd Parliament of Great Britain, member of the 4th Parliament of Great Britain, Lord Lieutenant of Essex
- Born
- 1688, August 14, 1688
- Died
- 1741, April 20, 1741