LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Mieczislaus

Mieczislaus m sg (genitive Mieczislaī)
Classical[mi.ɛɡˈzɪs.ɫa.ʊs]Ecclesiastical[mi.ekˈd͡ziz.la.us]

Meaning

  1. masculinesingulara male given name from Polish
    Qua splendido comitatu Gnesman advecta Mieczislaus baptismo, ut convenerat, ritu Christianorum initiatur & post nuptias magna celebritate peragit anno Christi nongentesimo sexagesimo quinto.1626, Salomon Neugebauer, Icones et vitae principum ac regum Poloniae omnium, page 30:

Declension

declension
formsingularplural
nominativeMieczislaus—
genitiveMieczislaī—
dativeMieczislaō—
accusativeMieczislaum—
ablativeMieczislaō—
vocativeMieczislae—

Origins

Borrowed from Polish Mieczysław + -us.

Quick answers

What does Mieczislaus mean in Latin?
Mieczislaus, a proper noun, means “a male given name from Polish”.
What is the genitive of Mieczislaus?
The genitive singular is Mieczislaī. Mieczislaus is masculine, second declension.
How do you pronounce Mieczislaus?
In classical Latin, [mi.ɛɡˈzɪs.ɫa.ʊs]; in ecclesiastical (church) Latin, [mi.ekˈd͡ziz.la.us].