Hryhorchuk is a Ukrainian surname derived from the given name "Hryhor", or Gregory. A variant Ryhorchuk is derived from the simplified variant "Ryhor" of the given name "Hryhor".
The Russified form is Grigorchuk. Belarusian forms: Hryharchuk (from Ukrainian), Grygarchuk (via Russian), or Ryharchuk (native or from "Ryhorchuk"). Polonized form: Gregorczuk. Lithuanized: Grigorčukas (via Russian), Gregorčukas (via Polish)
Notable people with the surname include:
Lidiia Hryhorchuk Roman Hryhorchuk Rostislav Grigorchuk
See also
Grigorchuk group