List of Famous people named Siemowit

Here are some famous Siemowits:

Siemowit IV

First Name Siemowit
Born on January 1, 1352
Died on January 21, 1426 (aged 74)

Siemowit IV, also known as Siemowit IV the Younger, was a Polish prince member of the House of Piast from the Masovian branch, from 1373/74 Duke of Rawa, and after the division of the paternal inheritance between him and his brother in 1381, ruler over Rawa, Płock, Sochaczew, Gostynin, Płońsk and Wizna, since 1386 hereditary Polish vassal, since 1388 ruler over Belz, during 1382–1401 he lost Wizna and during 1384–1399 and 1407–1411 he lost Zawkrze, during 1384–1399 he lost Płońsk, taken by the Teutonic Order.

Know him/her \
Don't know him/her

Siemowit III, Duke of Masovia

First Name Siemowit
Born on January 1, 1314
Died on June 16, 1381 (aged 67)

Siemowit III of Masovia was a prince of Masovia and a co-regent of the lands of Warsaw, Czersk, Rawa, Gostynin and other parts of Masovia.

Know him/her \
Don't know him/her

Siemowit V of Masovia

First Name Siemowit
Born on January 1, 1389
Died on February 16, 1442 (aged 53)

Siemowit V of Rawa, was a Polish prince member of the House of Piast from the Masovian branch. He was a Duke of Rawa Mazowiecka, Płock, Sochaczew, Gostynin, Płońsk, Wizna and Belz during 1426-1434 jointly with his brothers, and after the division of the paternal inheritance between him and his brothers in 1434, sole ruler over Rawa Mazowiecka, Gostynin and Sochaczew.

Know him/her \
Don't know him/her

Siemowit, Duke of Kuyavia-Brieg

First Name Siemowit,
Born on January 1, 1265
Died on January 1, 1312 (aged 47)

Siemowit of Dobrzyń, was a Polish prince member of the House of Piast, Duke of Brześć Kujawski during 1267–1288, Duke of Dobrzyń during 1288–1293, 1295–1303 and 1305–1312, during 1293–1295 in captivity in Lithuania, during 1303–1305 deposed, since 1306 hereditary vassal of the Kingdom of Poland.

Know him/her \
Don't know him/her

Siemowit of Cieszyn

First Name Siemowit
Born on January 1, 1340
Died on September 25, 1391 (aged 51)

Siemowit of Cieszyn was a Polish prince, member of the Piast dynasty in the Cieszyn branch.

Know him/her \
Don't know him/her

Siemowit I of Masovia

First Name Siemowit
Died on June 23, 1262

Siemowit I of Masovia, was a Polish prince member of the House of Piast, Duke of Czersk during 1247-1248, Duke of Masovia during 1248-1262, ruler over Sieradz during 1259-1260.

Know him/her \
Don't know him/her

Siemowit II of Masovia

First Name Siemowit
Born on January 1, 1283
Died on February 19, 1345 (aged 62)

Siemowit II of Rawa, was a Polish prince member of the House of Piast, Duke of Warsaw and Liw during 1310-1313, after a new division with his brothers since 1313 ruler over Rawa Mazowiecka, Sochaczew, Zakroczym, Gostynin, Ciechanów and Wizna, regent of Płock during 1336–1340.

Know him/her \
Don't know him/her

Siemowit of Bytom

First Name Siemowit
Born on January 1, 1292
Died on July 1, 1342 (aged 50)

Siemowit of Bytom (Polish: Siemowit bytomski;, was a Duke of Bytom during 1312–1316 and Duke of Gliwice from 1340 until his death.

Know him/her \
Don't know him/her

Siemowit VI of Masovia

First Name Siemowit
Died on January 1, 1462

Siemowit VI of Płock, was a Polish prince member of the House of Piast from the Masovian branch. He was a Duke of Płock, Rawa Mazowiecka, Belz, Płońsk, Zawkrze and Wizna during 1455-1461/62 jointly with his brother, since 1459 ruler over Gostynin.

Know him/her \
Don't know him/her
    index: 1x 0.12075805664062s
fmsppl-page-output: 1x 0.11138200759888s
t_/pages/list-of-people: 1x 0.11132788658142s
t_/blocks/list-of-people: 1x 0.080213069915771s
t_/blocks/person-card: 9x 0.073367834091187s
t_/common/header: 1x 0.009768009185791s
router_page: 1x 0.0085139274597168s
headline: 2x 0.0083718299865723s
list-of-people-content: 1x 0.0074748992919922s
qids: 2x 0.0018389225006104s
related: 1x 0.00087094306945801s
t_/common/footer: 1x 0.00050997734069824s
t_/common/head: 1x 0.00032782554626465s
head-facts: 1x 0.00029706954956055s
t_/blocks/switcher: 1x 2.0027160644531E-5s
using-qids-cache: 1x 1.1920928955078E-6s
----- END OF DUMP (2025-07-19 09:54:07)  -----