Zbigniew m PolishDerived from the Slavic elements
jĭzbyti "to dispel" and
gněvŭ "anger". This was the name of a 12th-century duke of Poland.
Ziemowit m PolishFrom an old Polish name derived from the elements
sěmĭja "family" and
vitŭ "master, lord". This was the name of a semi-legendary duke of Poland. It was also borne by several other Piast rulers of Masovia.