Niemir, Niemirz, Niemierz – is a male Slavic given name of Old Slavic origin, present in other Slavic nations (in different forms and spellings).
The name is composed of nie- (a negation) as well as -mir ("peace", "good", "great", "famous"), present in a number of other Slavic given names such as Mirogniew and Mirogod and related to Gothic naming element mērs, -mir, c.f.
Theodemir, Valamir.
Medieval texts from Mazovia often substitute this given name in the form of Niemierza as Erasmus, a male given name derived from Ancient Greek.
The name day for Niemir is celebrated on February 14 in Poland.