Siemowit
An old Slavic name meaning "lord of the family". Almost no one in Poland carries it, so meeting a Siemowit sticks with you, and the handful of boys given it lately marks it as a name on its way back rather than a leftover.
Siemowit Pronunciation
Siemowit is pronounced she-MO-veet (/ɕɛˈmɔvit/).
What Siemowit means
Where Siemowit comes from and what it has meant to the people who carry it.
Siemowit is a Slavic name, and its old parts point toward one idea: lord of the family, pan rodu in Polish. The first element ties to the household and its kin, the second to a ruler or master. Together they name someone set at the head of his people.
The name reaches back to the start of Polish memory. Gallus Anonymus, writing his chronicle around 1113, records Siemowit as the son of Piast the Wheelwright and the first ruler of the line that became the Piast dynasty. The name sits at the origin of Poland's founding legend.
Later it spread through the dukes of Masovia, several of whom carried it as Siemowit or the variant Ziemowit, from the thirteenth century into the fifteenth. The Z form grew common enough that many Poles now meet the name first as Ziemowit.
The name is rare now. On a school register a Siemowit stands out among the Jakubs and Szymons, and the sense holds: pan rodu, lord of the family.
When Siemowit celebrates name day
Siemowit appears 1 time in the Polish name day calendar, never as a main name. The first of these dates is 18 October.
Rarer dates. Only the most complete calendars add this name on these days. Most skip them, so hardly anyone celebrates then.
How many people are named Siemowit
1 in 323427 men in Poland is named Siemowit. 66 people carry it in the 2025 register: rank #4491 among male names.
Siemowit's popularity over time
3 boys were given the name in 2025, ranking #1358 among newborns. It has been climbing since 2023.
Where Siemowit is most popular
Siemowit is most popular in Warmian-Masurian, 447% above the national average (2 boys born 2019–2025), followed by Lower Silesian (+275%) and Masovian (+122%).
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Warmian-Masurian2 boys born+447%
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Lower Silesian3 boys born+275%
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Masovian4 boys born+122%
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Silesian2 boys born+73%
Siemowit as a middle name
Siemowit is a first name for 66 men in Poland and a middle name for another 23, a 74/26 split. In the men's middle-name ranking it sits 1829th, between Sidney (23) and Sinan (23).
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#1827 Satish23
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#1828 Sidney23
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#1829 Siemowit23
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#1830 Sinan23
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#1831 Sędzimir23