in 1224
Precision: year · Rank: normal
No external source identified
THE DATE BEHIND THE NAME
Siemowit I of Masovia
Siemowit I of Masovia has incompatible recorded birth dates. The main Wikidata statement lists in 1215.
Born
in 1215
An exact age is omitted because the recorded dates are incompatible or not precise enough.
Died: June 30, 1262
Source:
No external source identified
Synchronized from Wikidata on 2026-10-05.
Incompatible birth dates
Sources disagree: in 1215 (No external source identified) or in 1224 (No external source identified).
The main date retains its own sources. These alternatives overlap neither all other statements nor the main date. Rank is Wikidata editorial priority, not proof.
More about Siemowit I of Masovia
Family
- Father
- Konrad I of Masovia
- Sibling
- Bolesław I of Masovia
- Sibling
- Casimir I of Kuyavia
- Child
- Bolesław II of Masovia
- Child
- Konrad II of Masovia
- Mother
- Agafia of Rus
All birth date sources
A source is P248 “stated in” or a non-Wikimedia reference URL. Import-only references do not qualify.
No external source identified
Synchronized from Wikidata on 2026-10-05. View Wikidata record
Questions people ask
When did Siemowit I of Masovia die?
Siemowit I of Masovia died on June 30, 1262.