Stephenson Family Tree » Siemowit IV Piast Duke of Masovia (± 1353-1426)

Personal data Siemowit IV Piast Duke of Masovia 


Household of Siemowit IV Piast Duke of Masovia

(1) He is married to Alexandra Gediminid of Lithuania.

They got married in the year 1387 at Vilnius, Lithuania.


Child(ren):

  1. Cymburgis of Masovia  1394-1429 
  2. Siemowit V Piastowicz  ± 1389-1442
  3. Jadwiga Piastówna  1393-1439
  4. Euphemia Piast  ± 1395-< 1447
  5. Amelia Piastówna  ± 1397-> 1424
  6. Kazimierz II Piast  ± 1400-1442
  7. Aleksander Piast  1400-1444
  8. Trojden II Piast  ± 1405-1427
  9. Anna Piastówna  ± 1410-± 1433
  10. Maria Piastówna  ± 1410-1454
  11. Władysław I Piast  ± 1410-1455
  12. Katarzyna Piastówna  ± 1415-± 1479


(2) He is married to Alexandra Gediminid of Lithuania.

They got married in the year 1387 at Vilnius, Lithuania.

Do you have supplementary information, corrections or questions with regards to Siemowit IV Piast Duke of Masovia?
The author of this publication would love to hear from you!


Timeline Siemowit IV Piast Duke of Masovia

  This functionality is only available in Javascript supporting browsers.
Click on the names for more info. Symbols used: grootouders grandparents   ouders parents   broers-zussen brothers/sisters   kinderen children

Ancestors (and descendant) of Siemowit IV Piast


With Quick Search you can search by name, first name followed by a last name. You type in a few letters (at least 3) and a list of personal names within this publication will immediately appear. The more characters you enter the more specific the results. Click on a person's name to go to that person's page.

  • You can enter text in lowercase or uppercase.
  • If you are not sure about the first name or exact spelling, you can use an asterisk (*). Example: "*ornelis de b*r" finds both "cornelis de boer" and "kornelis de buur".
  • It is not possible to enter charachters outside the standard alphabet (so no diacritic characters like ö and é).

The data shown has no sources.

Historical events

Day of death January 21, 1426

  • Gravin Jacoba (Beiers Huis) was from 1417 till 1433 sovereign of the Netherlands (also known as Graafschap Holland)
  • In the year 1426: Source: Wikipedia
    • May 16 » Gov. Thado of Mohnyin becomes king of Ava.
    • November 7 » Lam Sơn uprising: Lam Sơn rebels emerge victorious against the Ming army in the Battle of Tốt Động – Chúc Động taking place in Đông Quan, in now Hanoi.


Same birth/death day

Source: Wikipedia


About the surname Piast

  • View the information that Genealogie Online has about the surname Piast.
  • Check the information Open Archives has about Piast.
  • Check the Wie (onder)zoekt wie? register to see who is (re)searching Piast.

The Stephenson Family Tree publication was prepared by .contact the author
When copying data from this family tree, please include a reference to the origin:
Brian K. Stephenson , "Stephenson Family Tree", database, Genealogy Online (https://www.genealogieonline.nl/stephenson-family-tree/I64350.php : accessed May 4, 2025), "Siemowit IV Piast Duke of Masovia (± 1353-1426)".