Yes, Slepicka is a Czech surname. It means "little hen".
Sources: I am Czechoamerican and I do speak some Czech. Plus, I have met some Slepickas before, in the Czech Republic.
The cast of Tholo potami - 2000 includes: Zdenek Maryska Milan Slepicka Ladislav Trojan as Aristeidis Sakas
The cast of Hui Buh - 2006 includes: Hans Clarin as Kastellan Siegfried Effenberger as Arbeiter-Geist Ivan Furak as Dekorateur 2 Martin Kurz as Tommy Jan Loukota as Pelzmonster-Geist Hans Paetsch as Narrator Oliver Pocher as Fahrstuhlansager-Geist Franziska Schlattner as Frankensteins Braut-Geist Milan Slepicka as Voodoo-Geist Zdenek Stadtherr as Polizei-Geist 3 Mac Steinmeier as Frankenstein-Geist Jan Vosmik as Polizei-Geist 5