Siemowit I of Masovia

Polish duke
Person human Q2701734
Siemowit I of Masovia
Jan Styfi / Andrzej Zajkowski / Jan Matejko · Public Domain · Wikimedia
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Siemowit I of Masovia

Summary

Siemowit I of Masovia is a human[1]. He was born on January 1, 1215[2]. He died on June 23, 1262[3]. He ranks in the top 0.73% of human entities by monthly Wikipedia readership (25 views/month, #7,282 of 1,000,298).[4]

Key Facts

  • Siemowit I of Masovia was born on January 1, 1215[2].
  • Siemowit I of Masovia was born on 1224[5].
  • Siemowit I of Masovia died on June 23, 1262[3].
  • Siemowit I of Masovia's father was Konrad I of Masovia[6].
  • Siemowit I of Masovia's mother was Agafia of Rus[7].
  • Siemowit I of Masovia was married to Pereiaslawa of Galicia[8].
  • A child of Siemowit I of Masovia was Bolesław II of Masovia[9].
  • A child of Siemowit I of Masovia was Konrad II of Masovia[10].
  • A child of Siemowit I of Masovia was Q125822393[11].
  • Siemowit I of Masovia is recorded as male[12].
  • Siemowit I of Masovia's instance of is recorded as human[13].
  • Siemowit I of Masovia's family is recorded as Piast dynasty[14].
  • Siemowit I of Masovia's family is recorded as Piasts of Mazovia[15].
  • Siemowit I of Masovia's Commons category is recorded as Siemowit I, Duke of Masovia[16].
  • Siemowit I of Masovia's given name is recorded as Siemowit[17].
  • Siemowit I of Masovia's described by source is recorded as Polish Biographical Dictionary[18].
  • Siemowit I of Masovia's sibling is recorded as Judith of Masovia[19].
  • Siemowit I of Masovia's sibling is recorded as Bolesław I of Masovia[20].
  • Siemowit I of Masovia's sibling is recorded as Casimir I of Kuyavia[21].

Body

Origins and Family

Recorded date of birth include January 1, 1215[2] and 1224[5]. Siemowit I of Masovia's father was Konrad I of Masovia[6]. His mother was Agafia of Rus[7].

Personal Life

Siemowit I of Masovia was married to Pereiaslawa of Galicia[8]. Children include Bolesław II of Masovia[9], 1251–1313[22]; Konrad II of Masovia[10], 1250–1294[23]; and Q125822393[11], of Duchy of Masovia[24].

Death and Burial

Siemowit I of Masovia died on June 23, 1262[3].

Why It Matters

Siemowit I of Masovia ranks in the top 0.73% of human entities by monthly Wikipedia readership (25 views/month, #7,282 of 1,000,298).[4] He has Wikipedia articles in 11 language editions, a strong signal of global cultural recognition.[25] He is known by 11 alternative names across languages and contexts.[26]

FAQs

Who were Siemowit I of Masovia's parents?

Siemowit I of Masovia's father was Konrad I of Masovia[6]. Siemowit I of Masovia's mother was Agafia of Rus[7].

Who was Siemowit I of Masovia married to?

Siemowit I of Masovia's spouses include Pereiaslawa of Galicia[8].

References

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

Direct Wikidata claims

  1. [12] . wikidata.org.
  2. [6] . wikidata.org.
  3. [7] . wikidata.org.
  4. [8] . Retrieved . wikidata.org.
  5. [13] . wikidata.org.
  6. [9] . wikidata.org.
  7. [10] . wikidata.org.
  8. [11] . wikidata.org.
  9. [14] . wikidata.org.
  10. [15] . wikidata.org.
  11. [16] . wikidata.org.
  12. [2] . wikidata.org.
  13. [5] . wikidata.org.
  14. [3] . wikidata.org.
  15. [17] . wikidata.org.
  16. [18] . wikidata.org.
  17. [19] . wikidata.org.
  18. [20] . wikidata.org.
  19. [21] . wikidata.org.

Inline context (facts about related entities)

  1. [22] . Wikidata. wikidata.org. → on this site
  2. [23] . Wikidata. wikidata.org. → on this site
  3. [24] . Wikidata. wikidata.org. → on this site

Class ancestry

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

Aggregate / graph-position facts

  1. [4] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [25] . Wikidata sitelinks. wikidata.org.
  3. [26] . 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 I of Masovia. Retrieved April 10, 2026, from https://4ort.xyz/entity/siemowit-i-of-masovia
MLA “Siemowit I of Masovia.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/siemowit-i-of-masovia.
BibTeX @misc{4ortxyz_siemowit-i-of-masovia_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Siemowit I of Masovia}}, year = {2026}, url = {https://4ort.xyz/entity/siemowit-i-of-masovia}, note = {Accessed: 2026-04-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Siemowit I of Masovia — https://4ort.xyz/entity/siemowit-i-of-masovia (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. 7w ago · Lesko987a · 2026-05-18 view diff on Wikidata ↗
    Child Bolesław II of Masovia, Konrad II of Masovia, Q125822393
    Family Piast dynasty, Piasts of Mazovia
    Instance of
    Instance of human
    + 8 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/32151|batch #32151]]: P2949 Update Qualifiers"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.