Phaedrig Lucius Ambrose O'Brien, 17th Baron Inchiquin was a geologist. Additionally, he was the holder of a hereditary peerage in the Peerage of Ireland, as well as Chief of the Name of O'Brien and Prince of Thomond in the Gaelic Irish nobility.
- Occupation
- geologist
- Citizenship
- United Kingdom, United Kingdom of Great Britain and Ireland
- Born
- April 4, 1900
- Died
- 1982