Vyacheslav, also transliterated Viacheslav or Viatcheslav (Russian: Вячеслав, pronounced [vʲɪtɕɪˈslaf] ⓘ; Ukrainian: В'ячеслав, pronounced [wjɐtʃeˈslɑu̯] ⓘ), is a Russian and Ukrainian masculine given name. It is the equivalent of Belarusian Вячаслаў/Вацлаў (transliterated Viačaslaŭ/Vaclaŭ, or Viachaslau/Vaclau), Croatian Vjenceslav, Czech Václav, Polish Wacław and Więcesław — Latinised as Wenceslaus. Also: Romanian of Moldova Veaceslav.
It is a Slavic dithematic name (that is, composed of two lexemes) derived from the Slavic words vyache, "great(er)", and slava, "glory, fame". Common short forms are Slava, Slavik.
Feminine forms: Vyacheslava, Więcesława.
Notable people with the name include Russian poet Vyacheslav Ivanov, actor Vyacheslav Tikhonov, and fashion designer Slava Zaitsev.
Notable people with the given name Vyacheslav, Viacheslav or Viatcheslav include: