Siemowit IV

Duke of Masovia
Person human Q1980579
Press Enter · cited answer in seconds

Siemowit IV

Summary

Siemowit IV is a human[1]. He was born on +1352-01-01T00:00:00Z[2]. He died in Gostynin[3]. He died on +1426-01-21T00:00:00Z[4]. He worked as an aristocrat[5]. He ranks in the top 0.73% of human entities by monthly Wikipedia readership (35 views/month, #7,266 of 1,000,298).[6]

Key Facts

  • Siemowit IV died in Gostynin[3].
  • Siemowit IV was born on +1352-01-01T00:00:00Z[2].
  • Siemowit IV died on +1426-01-21T00:00:00Z[4].
  • Burial took place at Płock Cathedral[7].
  • Siemowit IV's father was Siemowit III, Duke of Masovia[8].
  • Siemowit IV's mother was Euphemia of Opava[9].
  • Among Siemowit IV's spouses was Alexandra of Lithuania[10].
  • A child of Siemowit IV was Euphemia of Masovia[11].
  • A child of Siemowit IV was Maria of Masovia[12].
  • A child of Siemowit IV was Cymburgis of Masovia[13].
  • A child of Siemowit IV was Władysław I of Masovia[14].
  • A child of Siemowit IV was Trojden II of Płock[15].
  • A child of Siemowit IV was Casimir II of Masovia[16].
  • Siemowit IV worked as an aristocrat[5].
  • Siemowit IV's religion is recorded as Catholicism[17].
  • Siemowit IV's image is recorded as Gostynin ~23ocdcad.jpg[18].
  • Siemowit IV is recorded as male[19].
  • Siemowit IV's instance of is recorded as human[20].
  • Siemowit IV's family is recorded as Piast dynasty[21].
  • Siemowit IV's family is recorded as Piasts of Mazovia[22].
  • Siemowit IV's noble title is recorded as knyaz[23].
  • Siemowit IV's seal image is recorded as Ziemowit 4.JPG[24].
  • Siemowit IV's ISNI is recorded as 0000000022466646[25].
  • Siemowit IV's VIAF cluster ID is recorded as 18078851[26].
  • Siemowit IV's GND ID is recorded as 121434397[27].

Body

Origins and Family

Siemowit IV was born on +1352-01-01T00:00:00Z[2]. His father was Siemowit III, Duke of Masovia[8]. His mother was Euphemia of Opava[9].

Career and Affiliations

Siemowit IV's professions included aristocrat[5].

Personal Life

Siemowit IV was married to Alexandra of Lithuania[10]. Children include Euphemia of Masovia[11], a politician[28], 1395–1447[29]; Maria of Masovia[12], a politician[30]; Cymburgis of Masovia[13], a consort[31], 1394–1429[32], of Kingdom of Poland[33]; Władysław I of Masovia[14], 1389–1455[34]; Trojden II of Płock[15], 1403–1427[35]; and Casimir II of Masovia[16], 1400–1442[36]. His religion is recorded as Catholicism[17].

Death and Burial

Siemowit IV died on +1426-01-21T00:00:00Z[4]. He passed away in Gostynin[3]. Burial took place at Płock Cathedral[7].

Why It Matters

Siemowit IV ranks in the top 0.73% of human entities by monthly Wikipedia readership (35 views/month, #7,266 of 1,000,298).[6] He has Wikipedia articles in 14 language editions, a strong signal of global cultural recognition.[37] He is known by 9 alternative names across languages and contexts.[38]

FAQs

Where did Siemowit IV die?

Siemowit IV passed away in Gostynin[3].

Who were Siemowit IV's parents?

Siemowit IV's father was Siemowit III, Duke of Masovia[8]. Siemowit IV's mother was Euphemia of Opava[9].

Who was Siemowit IV married to?

Siemowit IV's spouses include Alexandra of Lithuania[10].

What did Siemowit IV do for work?

Siemowit IV worked as aristocrat[5].

References

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

Direct Wikidata claims

  1. [18] . wikidata.org.
  2. [3] . wikidata.org.
  3. [19] . Q24415113. wikidata.org.
  4. [8] . Q24415113. wikidata.org.
  5. [9] . wikidata.org.
  6. [10] . Retrieved . wikidata.org.
  7. [20] . Q24415113. wikidata.org.
  8. [11] . wikidata.org.
  9. [12] . wikidata.org.
  10. [13] . wikidata.org.
  11. [14] . Retrieved . wikidata.org.
  12. [15] . wikidata.org.
  13. [16] . wikidata.org.
  14. [21] . Q24415113. wikidata.org.
  15. [22] . wikidata.org.
  16. [23] . Q24415113. wikidata.org.
  17. [5] . wikidata.org.
  18. [7] . wikidata.org.
  19. [17] . wikidata.org.
  20. [24] . wikidata.org.
  21. [25] . wikidata.org.
  22. [26] . Faceted Application of Subject Terminology. wikidata.org.
  23. [27] . wikidata.org.
  24. [2] . wikidata.org.
  25. [4] . The Peerage. Retrieved . wikidata.org.

Inline context (facts about related entities)

  1. [28] . Wikidata. wikidata.org. → on this site
  2. [29] . Wikidata. wikidata.org. → on this site
  3. [30] . Wikidata. wikidata.org. → on this site
  4. [31] . Wikidata. wikidata.org. → on this site
  5. [32] . Wikidata. wikidata.org. → on this site
  6. [33] . 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

Class ancestry

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

Aggregate / graph-position facts

  1. [6] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [37] . Wikidata sitelinks. wikidata.org.
  3. [38] . Wikidata aliases. 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). Siemowit IV. Retrieved April 10, 2026, from https://4ort.xyz/entity/siemowit-iv
MLA “Siemowit IV.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/siemowit-iv.
BibTeX @misc{4ortxyz_siemowit-iv_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Siemowit IV}}, year = {2026}, url = {https://4ort.xyz/entity/siemowit-iv}, note = {Accessed: 2026-04-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Siemowit IV — https://4ort.xyz/entity/siemowit-iv (retrieved 2026-04-10)

Canonical URL: https://4ort.xyz/entity/siemowit-iv · Last refreshed: