Robert Stewart, 1st Marquess of Londonderry

Irish politician, born 1739
Person human Q5192091
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Robert Stewart, 1st Marquess of Londonderry

Summary

Robert Stewart, 1st Marquess of Londonderry is a human[1]. He was born on September 27, 1739[2]. He passed away in County Down[3]. He died on April 6, 1821[4]. He worked as a politician[5]. He ranks in the top 0.72% of human entities by monthly Wikipedia readership (73 views/month, #7,242 of 1,000,298).[6]

Key Facts

  • Robert Stewart, 1st Marquess of Londonderry died in County Down[3].
  • Robert Stewart, 1st Marquess of Londonderry was born on September 27, 1739[2].
  • Robert Stewart, 1st Marquess of Londonderry died on April 6, 1821[4].
  • Robert Stewart, 1st Marquess of Londonderry's father was Alexander Stewart[7].
  • Robert Stewart, 1st Marquess of Londonderry's mother was Mary Cowan[8].
  • Among Robert Stewart, 1st Marquess of Londonderry's spouses was Frances Stewart[9].
  • Robert Stewart, 1st Marquess of Londonderry was married to Sarah Seymour[10].
  • A child of Robert Stewart, 1st Marquess of Londonderry was Robert Stewart, Viscount Castlereagh[11].
  • A child of Robert Stewart, 1st Marquess of Londonderry was Charles Vane, 3rd Marquess of Londonderry[12].
  • A child of Robert Stewart, 1st Marquess of Londonderry was Octavia Stewart[13].
  • A child of Robert Stewart, 1st Marquess of Londonderry was Lady Matilda Stewart[14].
  • A child of Robert Stewart, 1st Marquess of Londonderry was Lady Georgiana Stewart[15].
  • A child of Robert Stewart, 1st Marquess of Londonderry was Lady Caroline Stewart[16].
  • Robert Stewart, 1st Marquess of Londonderry held citizenship in Ireland[17].
  • Robert Stewart, 1st Marquess of Londonderry's professions included politician[5].
  • Robert Stewart, 1st Marquess of Londonderry held the position of Member of Parliament in the Parliament of Ireland[18].
  • Robert Stewart, 1st Marquess of Londonderry held the position of Member of the Privy Council of Ireland[19].
  • Robert Stewart, 1st Marquess of Londonderry held the position of member of the House of Lords[20].
  • Robert Stewart, 1st Marquess of Londonderry is recorded as male[21].
  • Robert Stewart, 1st Marquess of Londonderry's instance of is recorded as human[22].
  • Robert Stewart, 1st Marquess of Londonderry's noble title is recorded as Marquess of Londonderry[23].
  • Robert Stewart, 1st Marquess of Londonderry's noble title is recorded as Earl of Londonderry[24].
  • Robert Stewart, 1st Marquess of Londonderry's noble title is recorded as Viscount Castlereagh[25].
  • Robert Stewart, 1st Marquess of Londonderry's noble title is recorded as Baron Londonderry[26].
  • Robert Stewart, 1st Marquess of Londonderry's Commons category is recorded as Robert Stewart, 1st Marquess of Londonderry[27].

Body

Origins and Family

Robert Stewart, 1st Marquess of Londonderry was born on September 27, 1739[2]. His father was Alexander Stewart[7]. His mother was Mary Cowan[8].

Career and Affiliations

Robert Stewart, 1st Marquess of Londonderry's professions included politician[5]. Positions held include Member of Parliament in the Parliament of Ireland[18]; Member of the Privy Council of Ireland[19]; and member of the House of Lords[20], a position[28], in United Kingdom[29], founded in 1801[30].

Personal Life

Spouses include Frances Stewart[9], 1750–1833[31] and Sarah Seymour[10], an aristocrat[32], 1747–1770[33]. Children include Robert Stewart, Viscount Castlereagh[11], a politician[34], 1769–1822[35], of United Kingdom of Great Britain and Ireland[36], awarded the Fellow of the Royal Society[37]; Charles Vane, 3rd Marquess of Londonderry[12], a politician[38], 1778–1854[39], of Ireland[40], awarded the Knight Grand Cross of the Order of the Bath[41]; Octavia Stewart[13], 1792–1819[42]; Lady Matilda Stewart[14]; Lady Georgiana Stewart[15], 1785–1804[43]; and Lady Caroline Stewart[16].

Death and Burial

Robert Stewart, 1st Marquess of Londonderry died on April 6, 1821[4]. He passed away in County Down[3].

Why It Matters

Robert Stewart, 1st Marquess of Londonderry ranks in the top 0.72% of human entities by monthly Wikipedia readership (73 views/month, #7,242 of 1,000,298).[6] He has Wikipedia articles in 6 language editions, a strong signal of global cultural recognition.[44] He is known by 4 alternative names across languages and contexts.[45]

FAQs

Where did Robert Stewart, 1st Marquess of Londonderry die?

Robert Stewart, 1st Marquess of Londonderry passed away in County Down[3].

Who were Robert Stewart, 1st Marquess of Londonderry's parents?

Robert Stewart, 1st Marquess of Londonderry's father was Alexander Stewart[7]. Robert Stewart, 1st Marquess of Londonderry's mother was Mary Cowan[8].

Who was Robert Stewart, 1st Marquess of Londonderry married to?

Robert Stewart, 1st Marquess of Londonderry's spouses include Frances Stewart[9] and Sarah Seymour[10].

What did Robert Stewart, 1st Marquess of Londonderry do for work?

Robert Stewart, 1st Marquess of Londonderry worked as politician[5].

References

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

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [21] . wikidata.org.
  3. [7] . Stewart, Robert. wikidata.org.
  4. [8] . The Peerage. wikidata.org.
  5. [9] . Q75653886. Retrieved . wikidata.org.
  6. [10] . Q75653886. Retrieved . wikidata.org.
  7. [17] . wikidata.org.
  8. [22] . wikidata.org.
  9. [18] . Stewart, Robert. wikidata.org.
  10. [19] . wikidata.org.
  11. [20] . wikidata.org.
  12. [11] . Q75653886. wikidata.org.
  13. [12] . Q75653886. wikidata.org.
  14. [13] . The Peerage. wikidata.org.
  15. [14] . The Peerage. wikidata.org.
  16. [15] . The Peerage. wikidata.org.
  17. [16] . The Peerage. wikidata.org.
  18. [23] . wikidata.org.
  19. [24] . wikidata.org.
  20. [25] . wikidata.org.
  21. [26] . wikidata.org.
  22. [5] . Stewart, Robert. wikidata.org.
  23. [27] . wikidata.org.
  24. [2] . SNAC. Retrieved . wikidata.org.
  25. [4] . SNAC. Retrieved . wikidata.org.

Inline context (facts about related entities)

  1. [31] . Wikidata. wikidata.org. → on this site
  2. [32] . Wikidata. wikidata.org. → on this site
  3. [33] . Wikidata. wikidata.org. → on this site
  4. [28] . Wikidata. wikidata.org. → on this site
  5. [29] . Wikidata. wikidata.org. → on this site
  6. [30] . Wikidata. wikidata.org. → on this site
  7. [34] . Wikidata. wikidata.org. → on this site
  8. [35] . Wikidata. wikidata.org. → on this site
  9. [36] . Wikidata. wikidata.org. → on this site
  10. [37] . Wikidata. wikidata.org. → on this site
  11. [38] . Wikidata. wikidata.org. → on this site
  12. [39] . Wikidata. wikidata.org. → on this site
  13. [40] . Wikidata. wikidata.org. → on this site
  14. [41] . Wikidata. wikidata.org. → on this site
  15. [42] . Wikidata. wikidata.org. → on this site
  16. [43] . Wikidata. wikidata.org. → on this site

Class ancestry

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

Aggregate / graph-position facts

  1. [6] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [44] . Wikidata sitelinks. wikidata.org.
  3. [45] . Wikidata aliases. wikidata.org.

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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). Robert Stewart, 1st Marquess of Londonderry. Retrieved April 10, 2026, from https://4ort.xyz/entity/robert-stewart-1st-marquess-of-londonderry
MLA “Robert Stewart, 1st Marquess of Londonderry.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/robert-stewart-1st-marquess-of-londonderry.
BibTeX @misc{4ortxyz_robert-stewart-1st-marquess-of-londonderry_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Robert Stewart, 1st Marquess of Londonderry}}, year = {2026}, url = {https://4ort.xyz/entity/robert-stewart-1st-marquess-of-londonderry}, note = {Accessed: 2026-04-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Robert Stewart, 1st Marquess of Londonderry — https://4ort.xyz/entity/robert-stewart-1st-marquess-of-londonderry (retrieved 2026-04-10)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 8w ago · Epìdosis · 2026-05-12 view diff on Wikidata ↗
    Given name Robert
    Country of citizenship Ireland
    Sex or gender male
    Depicted by Robert Stewart, 1st Marquess of Londonderry
    + 18 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/30850|batch #30850]]: match CERL IDs on the basis of GND (6)"
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