Sir John O'Brien, 5th Bt.

(1899-1969)
Person human Q75323051
Press Enter · cited answer in seconds

Sir John O'Brien, 5th Bt.

Summary

Sir John O'Brien, 5th Bt. is a human[1]. Sir John O'Brien, 5th Bt. was born on +1899-12-23T00:00:00Z[2]. Sir John O'Brien, 5th Bt. died on +1969-09-28T00:00:00Z[3].

Key Facts

  • Sir John O'Brien, 5th Bt. was born on +1899-12-23T00:00:00Z[2].
  • Sir John O'Brien, 5th Bt. died on +1969-09-28T00:00:00Z[3].
  • Sir John O'Brien, 5th Bt.'s father was Edmond Lyons O'Brien[4].
  • Sir John O'Brien, 5th Bt.'s mother was Audrey Townsend Crawford[5].
  • Sir John O'Brien, 5th Bt. was married to Moira Brassey[6].
  • Among Sir John O'Brien, 5th Bt.'s spouses was Rosemary Grotrian[7].
  • A child of Sir John O'Brien, 5th Bt. was Mary Clare O'Brien[8].
  • Sir John O'Brien, 5th Bt. is recorded as male[9].
  • Sir John O'Brien, 5th Bt.'s instance of is recorded as human[10].
  • Sir John O'Brien, 5th Bt.'s honorific prefix is recorded as Sir[11].
  • Sir John O'Brien, 5th Bt.'s family name is recorded as O'Brien[12].
  • Sir John O'Brien, 5th Bt.'s given name is recorded as John[13].
  • Sir John O'Brien, 5th Bt.'s The Peerage person ID is recorded as p6277.htm#i62761[14].

Body

Origins and Family

Sir John O'Brien, 5th Bt. was born on +1899-12-23T00:00:00Z[2]. Sir John O'Brien, 5th Bt.'s father was Edmond Lyons O'Brien[4]. His mother was Audrey Townsend Crawford[5].

Personal Life

Spouses include Moira Brassey[6] and Rosemary Grotrian[7], 1906–1980[15]. A child of Sir John O'Brien, 5th Bt. was Mary Clare O'Brien[8].

Death and Burial

Sir John O'Brien, 5th Bt. died on +1969-09-28T00:00:00Z[3].

FAQs

Who were Sir John O'Brien, 5th Bt.'s parents?

Sir John O'Brien, 5th Bt.'s father was Edmond Lyons O'Brien[4]. Sir John O'Brien, 5th Bt.'s mother was Audrey Townsend Crawford[5].

Who was Sir John O'Brien, 5th Bt. married to?

Sir John O'Brien, 5th Bt.'s spouses include Moira Brassey[6] and Rosemary Grotrian[7].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [9] . The Peerage. wikidata.org.
  2. [4] . The Peerage. wikidata.org.
  3. [5] . The Peerage. wikidata.org.
  4. [6] . Retrieved . wikidata.org.
  5. [7] . Retrieved . wikidata.org.
  6. [10] . wikidata.org.
  7. [8] . The Peerage. wikidata.org.
  8. [11] . wikidata.org.
  9. [2] . The Peerage. wikidata.org.
  10. [3] . The Peerage. wikidata.org.
  11. [12] . wikidata.org.
  12. [13] . wikidata.org.
  13. [14] . Retrieved . wikidata.org.

Inline context (facts about related entities)

  1. [15] . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] . Wikidata. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Sir John O'Brien, 5th Bt.. Retrieved May 3, 2026, from https://4ort.xyz/entity/sir-john-o-brien-5th-bt-
MLA “Sir John O'Brien, 5th Bt..” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/sir-john-o-brien-5th-bt-.
BibTeX @misc{4ortxyz_sir-john-o-brien-5th-bt-_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Sir John O'Brien, 5th Bt.}}, year = {2026}, url = {https://4ort.xyz/entity/sir-john-o-brien-5th-bt-}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Sir John O'Brien, 5th Bt. — https://4ort.xyz/entity/sir-john-o-brien-5th-bt- (retrieved 2026-05-03)

Canonical URL: https://4ort.xyz/entity/sir-john-o-brien-5th-bt- · Last refreshed: