What does Vladislaus mean in Latin?

Vladislaus, a proper noun, means “a male given name from Polish”.

What is the genitive of Vladislaus?

The genitive singular is Vladislaī. Vladislaus is masculine, second declension.

In classical Latin, [wɫaˈdɪs.ɫa.ʊs]; in ecclesiastical (church) Latin, [vlaˈdiz.la.us].

proper noun · masculinesecond declension

Vladislaus m sg (genitive Vladislaī)

Classical[wɫaˈdɪs.ɫa.ʊs]Ecclesiastical[vlaˈdiz.la.us]

masculinesingulara male given name from Polish
Filios compulares, ac ex legitima quidem uxore Popielum suscepit, penes quemrerum summam esse volvit: e connubiis vero diversis viginti circiter, upote; Boleslaum, Bogdalum, Casimirum, Vladislaum, Vratislaum, Otam, [...]He had children by marriage, and indeed by his legitimate wife Popiel, and he wanted the sum of them to be in his possession: but from different marriages he had about twenty, including: Bolesław, Bogdał, Kazimierz, Władysław, Wratysław, Ota, …1626, Salomon Neugebauer, Icones et vitae principum ac regum Poloniae omnium, page 15:

Borrowed from Polish Władysław + -us m.